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Finding the Fourth Proportional to 40,385.80, 60,554.40 and 20,702.80

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Solution

The fourth proportional to 40,385.80, 60,554.40 and 20,702.80 is: 31,041.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,385.80 : 60,554.40 = 20,702.80 : x
  2. Step 2: Convert to fraction form
    40,385.80/60,554.40 = 20,702.80/x
  3. Step 3: Cross multiply
    40,385.80x = 60,554.40 × 20,702.80
  4. Step 4: Simplify right side
    40,385.80x = 1,253,645,632.32
  5. Step 5: Solve for x
    x = 1,253,645,632.32/40,385.80
  6. Step 6: Final answer
    x = 31,041.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.