Home / 21,715.29-29,943.32-14,147.60

Finding the Fourth Proportional to 21,715.29, 29,943.32 and 14,147.60

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Solution

The fourth proportional to 21,715.29, 29,943.32 and 14,147.60 is: 19,508.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.29 : 29,943.32 = 14,147.60 : x
  2. Step 2: Convert to fraction form
    21,715.29/29,943.32 = 14,147.60/x
  3. Step 3: Cross multiply
    21,715.29x = 29,943.32 × 14,147.60
  4. Step 4: Simplify right side
    21,715.29x = 423,625,893.58
  5. Step 5: Solve for x
    x = 423,625,893.58/21,715.29
  6. Step 6: Final answer
    x = 19,508.18

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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.