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Finding the Fourth Proportional to 28,500.43, 42,751.51 and 9,780.20

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Solution

The fourth proportional to 28,500.43, 42,751.51 and 9,780.20 is: 14,670.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,500.43 : 42,751.51 = 9,780.20 : x
  2. Step 2: Convert to fraction form
    28,500.43/42,751.51 = 9,780.20/x
  3. Step 3: Cross multiply
    28,500.43x = 42,751.51 × 9,780.20
  4. Step 4: Simplify right side
    28,500.43x = 418,118,318.10
  5. Step 5: Solve for x
    x = 418,118,318.10/28,500.43
  6. Step 6: Final answer
    x = 14,670.60

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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.