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Finding the Fourth Proportional to 28,700.76, 43,049.96 and 9,985.04

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Solution

The fourth proportional to 28,700.76, 43,049.96 and 9,985.04 is: 14,977.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,700.76 : 43,049.96 = 9,985.04 : x
  2. Step 2: Convert to fraction form
    28,700.76/43,049.96 = 9,985.04/x
  3. Step 3: Cross multiply
    28,700.76x = 43,049.96 × 9,985.04
  4. Step 4: Simplify right side
    28,700.76x = 429,855,572.60
  5. Step 5: Solve for x
    x = 429,855,572.60/28,700.76
  6. Step 6: Final answer
    x = 14,977.15

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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.