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Finding the Fourth Proportional to 28,427.92, 42,641.90 and 8,703.92

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Solution

The fourth proportional to 28,427.92, 42,641.90 and 8,703.92 is: 13,055.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.92 : 42,641.90 = 8,703.92 : x
  2. Step 2: Convert to fraction form
    28,427.92/42,641.90 = 8,703.92/x
  3. Step 3: Cross multiply
    28,427.92x = 42,641.90 × 8,703.92
  4. Step 4: Simplify right side
    28,427.92x = 371,151,686.25
  5. Step 5: Solve for x
    x = 371,151,686.25/28,427.92
  6. Step 6: Final answer
    x = 13,055.89

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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.