Home / 39,409.90-54,385.80-21,505.30

Finding the Fourth Proportional to 39,409.90, 54,385.80 and 21,505.30

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Solution

The fourth proportional to 39,409.90, 54,385.80 and 21,505.30 is: 29,677.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,409.90 : 54,385.80 = 21,505.30 : x
  2. Step 2: Convert to fraction form
    39,409.90/54,385.80 = 21,505.30/x
  3. Step 3: Cross multiply
    39,409.90x = 54,385.80 × 21,505.30
  4. Step 4: Simplify right side
    39,409.90x = 1,169,582,565.28
  5. Step 5: Solve for x
    x = 1,169,582,565.28/39,409.90
  6. Step 6: Final answer
    x = 29,677.38

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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.