Home / 38,687.32-53,385.78-21,690.28

Finding the Fourth Proportional to 38,687.32, 53,385.78 and 21,690.28

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Solution

The fourth proportional to 38,687.32, 53,385.78 and 21,690.28 is: 29,931.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,687.32 : 53,385.78 = 21,690.28 : x
  2. Step 2: Convert to fraction form
    38,687.32/53,385.78 = 21,690.28/x
  3. Step 3: Cross multiply
    38,687.32x = 53,385.78 × 21,690.28
  4. Step 4: Simplify right side
    38,687.32x = 1,157,952,516.22
  5. Step 5: Solve for x
    x = 1,157,952,516.22/38,687.32
  6. Step 6: Final answer
    x = 29,931.06

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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.