Home / 21,680.28-29,918.78-12,248.68

Finding the Fourth Proportional to 21,680.28, 29,918.78 and 12,248.68

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Solution

The fourth proportional to 21,680.28, 29,918.78 and 12,248.68 is: 16,903.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,680.28 : 29,918.78 = 12,248.68 : x
  2. Step 2: Convert to fraction form
    21,680.28/29,918.78 = 12,248.68/x
  3. Step 3: Cross multiply
    21,680.28x = 29,918.78 × 12,248.68
  4. Step 4: Simplify right side
    21,680.28x = 366,465,562.21
  5. Step 5: Solve for x
    x = 366,465,562.21/21,680.28
  6. Step 6: Final answer
    x = 16,903.17

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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.