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Finding the Fourth Proportional to 28,610.96, 42,909.60 and 9,891.64

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Solution

The fourth proportional to 28,610.96, 42,909.60 and 9,891.64 is: 14,835.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,610.96 : 42,909.60 = 9,891.64 : x
  2. Step 2: Convert to fraction form
    28,610.96/42,909.60 = 9,891.64/x
  3. Step 3: Cross multiply
    28,610.96x = 42,909.60 × 9,891.64
  4. Step 4: Simplify right side
    28,610.96x = 424,446,315.74
  5. Step 5: Solve for x
    x = 424,446,315.74/28,610.96
  6. Step 6: Final answer
    x = 14,835.10

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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.