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Finding the Fourth Proportional to 12,521.81, 17,280.11 and 6,932.81

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Solution

The fourth proportional to 12,521.81, 17,280.11 and 6,932.81 is: 9,567.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,521.81 : 17,280.11 = 6,932.81 : x
  2. Step 2: Convert to fraction form
    12,521.81/17,280.11 = 6,932.81/x
  3. Step 3: Cross multiply
    12,521.81x = 17,280.11 × 6,932.81
  4. Step 4: Simplify right side
    12,521.81x = 119,799,779.94
  5. Step 5: Solve for x
    x = 119,799,779.94/12,521.81
  6. Step 6: Final answer
    x = 9,567.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.