Home / 22,215.47-30,643.52-13,720.19

Finding the Fourth Proportional to 22,215.47, 30,643.52 and 13,720.19

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Solution

The fourth proportional to 22,215.47, 30,643.52 and 13,720.19 is: 18,925.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,215.47 : 30,643.52 = 13,720.19 : x
  2. Step 2: Convert to fraction form
    22,215.47/30,643.52 = 13,720.19/x
  3. Step 3: Cross multiply
    22,215.47x = 30,643.52 × 13,720.19
  4. Step 4: Simplify right side
    22,215.47x = 420,434,694.85
  5. Step 5: Solve for x
    x = 420,434,694.85/22,215.47
  6. Step 6: Final answer
    x = 18,925.32

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Double scale
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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.