Home / 27,990.05-38,619.63-15,887.84

Finding the Fourth Proportional to 27,990.05, 38,619.63 and 15,887.84

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Solution

The fourth proportional to 27,990.05, 38,619.63 and 15,887.84 is: 21,921.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,990.05 : 38,619.63 = 15,887.84 : x
  2. Step 2: Convert to fraction form
    27,990.05/38,619.63 = 15,887.84/x
  3. Step 3: Cross multiply
    27,990.05x = 38,619.63 × 15,887.84
  4. Step 4: Simplify right side
    27,990.05x = 613,582,309.20
  5. Step 5: Solve for x
    x = 613,582,309.20/27,990.05
  6. Step 6: Final answer
    x = 21,921.45

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Double scale
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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.