Home / 12,688.31-19,032.17-5,292.61

Finding the Fourth Proportional to 12,688.31, 19,032.17 and 5,292.61

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Solution

The fourth proportional to 12,688.31, 19,032.17 and 5,292.61 is: 7,938.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.31 : 19,032.17 = 5,292.61 : x
  2. Step 2: Convert to fraction form
    12,688.31/19,032.17 = 5,292.61/x
  3. Step 3: Cross multiply
    12,688.31x = 19,032.17 × 5,292.61
  4. Step 4: Simplify right side
    12,688.31x = 100,729,779.22
  5. Step 5: Solve for x
    x = 100,729,779.22/12,688.31
  6. Step 6: Final answer
    x = 7,938.78

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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.