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Finding the Fourth Proportional to 8,317.47, 12,444.89 and 7,872.51

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Solution

The fourth proportional to 8,317.47, 12,444.89 and 7,872.51 is: 11,779.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,317.47 : 12,444.89 = 7,872.51 : x
  2. Step 2: Convert to fraction form
    8,317.47/12,444.89 = 7,872.51/x
  3. Step 3: Cross multiply
    8,317.47x = 12,444.89 × 7,872.51
  4. Step 4: Simplify right side
    8,317.47x = 97,972,481.61
  5. Step 5: Solve for x
    x = 97,972,481.61/8,317.47
  6. Step 6: Final answer
    x = 11,779.12

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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.