Home / 21,651.17-29,875.40-13,148.86

Finding the Fourth Proportional to 21,651.17, 29,875.40 and 13,148.86

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Solution

The fourth proportional to 21,651.17, 29,875.40 and 13,148.86 is: 18,143.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.17 : 29,875.40 = 13,148.86 : x
  2. Step 2: Convert to fraction form
    21,651.17/29,875.40 = 13,148.86/x
  3. Step 3: Cross multiply
    21,651.17x = 29,875.40 × 13,148.86
  4. Step 4: Simplify right side
    21,651.17x = 392,827,452.04
  5. Step 5: Solve for x
    x = 392,827,452.04/21,651.17
  6. Step 6: Final answer
    x = 18,143.47

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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.