Home / 22,218.76-30,619.66-15,920.20

Finding the Fourth Proportional to 22,218.76, 30,619.66 and 15,920.20

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Solution

The fourth proportional to 22,218.76, 30,619.66 and 15,920.20 is: 21,939.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,218.76 : 30,619.66 = 15,920.20 : x
  2. Step 2: Convert to fraction form
    22,218.76/30,619.66 = 15,920.20/x
  3. Step 3: Cross multiply
    22,218.76x = 30,619.66 × 15,920.20
  4. Step 4: Simplify right side
    22,218.76x = 487,471,111.13
  5. Step 5: Solve for x
    x = 487,471,111.13/22,218.76
  6. Step 6: Final answer
    x = 21,939.62

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Half scale
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Double scale
Find fourth proportional to 22,219.76, 30,621.04 and 15,921.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.