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Finding the Fourth Proportional to 28,426.76, 42,640.68 and 9,711.08

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Solution

The fourth proportional to 28,426.76, 42,640.68 and 9,711.08 is: 14,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,426.76 : 42,640.68 = 9,711.08 : x
  2. Step 2: Convert to fraction form
    28,426.76/42,640.68 = 9,711.08/x
  3. Step 3: Cross multiply
    28,426.76x = 42,640.68 × 9,711.08
  4. Step 4: Simplify right side
    28,426.76x = 414,087,054.73
  5. Step 5: Solve for x
    x = 414,087,054.73/28,426.76
  6. Step 6: Final answer
    x = 14,566.80

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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.