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Finding the Fourth Proportional to 28,534.59, 42,790.86 and 9,811.08

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Solution

The fourth proportional to 28,534.59, 42,790.86 and 9,811.08 is: 14,712.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,534.59 : 42,790.86 = 9,811.08 : x
  2. Step 2: Convert to fraction form
    28,534.59/42,790.86 = 9,811.08/x
  3. Step 3: Cross multiply
    28,534.59x = 42,790.86 × 9,811.08
  4. Step 4: Simplify right side
    28,534.59x = 419,824,550.73
  5. Step 5: Solve for x
    x = 419,824,550.73/28,534.59
  6. Step 6: Final answer
    x = 14,712.83

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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.