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Finding the Fourth Proportional to 28,909.80, 40,561.20 and 28,909.80

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Solution

The fourth proportional to 28,909.80, 40,561.20 and 28,909.80 is: 40,561.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,909.80 : 40,561.20 = 28,909.80 : x
  2. Step 2: Convert to fraction form
    28,909.80/40,561.20 = 28,909.80/x
  3. Step 3: Cross multiply
    28,909.80x = 40,561.20 × 28,909.80
  4. Step 4: Simplify right side
    28,909.80x = 1,172,616,179.76
  5. Step 5: Solve for x
    x = 1,172,616,179.76/28,909.80
  6. Step 6: Final answer
    x = 40,561.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.