Home / 21,535.84-29,714.16-13,149.28

Finding the Fourth Proportional to 21,535.84, 29,714.16 and 13,149.28

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Solution

The fourth proportional to 21,535.84, 29,714.16 and 13,149.28 is: 18,142.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,535.84 : 29,714.16 = 13,149.28 : x
  2. Step 2: Convert to fraction form
    21,535.84/29,714.16 = 13,149.28/x
  3. Step 3: Cross multiply
    21,535.84x = 29,714.16 × 13,149.28
  4. Step 4: Simplify right side
    21,535.84x = 390,719,809.80
  5. Step 5: Solve for x
    x = 390,719,809.80/21,535.84
  6. Step 6: Final answer
    x = 18,142.77

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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.