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Finding the Fourth Proportional to 28,391.15, 42,593.31 and 9,671.34

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Solution

The fourth proportional to 28,391.15, 42,593.31 and 9,671.34 is: 14,509.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,391.15 : 42,593.31 = 9,671.34 : x
  2. Step 2: Convert to fraction form
    28,391.15/42,593.31 = 9,671.34/x
  3. Step 3: Cross multiply
    28,391.15x = 42,593.31 × 9,671.34
  4. Step 4: Simplify right side
    28,391.15x = 411,934,382.74
  5. Step 5: Solve for x
    x = 411,934,382.74/28,391.15
  6. Step 6: Final answer
    x = 14,509.26

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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.