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Finding the Fourth Proportional to 8,557.65, 12,840.53 and 5,929.20

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Solution

The fourth proportional to 8,557.65, 12,840.53 and 5,929.20 is: 8,896.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.65 : 12,840.53 = 5,929.20 : x
  2. Step 2: Convert to fraction form
    8,557.65/12,840.53 = 5,929.20/x
  3. Step 3: Cross multiply
    8,557.65x = 12,840.53 × 5,929.20
  4. Step 4: Simplify right side
    8,557.65x = 76,134,070.48
  5. Step 5: Solve for x
    x = 76,134,070.48/8,557.65
  6. Step 6: Final answer
    x = 8,896.61

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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.