Home / 28,385.60-42,580.32-8,665.92

Finding the Fourth Proportional to 28,385.60, 42,580.32 and 8,665.92

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Solution

The fourth proportional to 28,385.60, 42,580.32 and 8,665.92 is: 12,999.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.60 : 42,580.32 = 8,665.92 : x
  2. Step 2: Convert to fraction form
    28,385.60/42,580.32 = 8,665.92/x
  3. Step 3: Cross multiply
    28,385.60x = 42,580.32 × 8,665.92
  4. Step 4: Simplify right side
    28,385.60x = 368,997,646.69
  5. Step 5: Solve for x
    x = 368,997,646.69/28,385.60
  6. Step 6: Final answer
    x = 12,999.47

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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.