Home / 11,390.31-15,725.75-8,732.61

Finding the Fourth Proportional to 11,390.31, 15,725.75 and 8,732.61

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Solution

The fourth proportional to 11,390.31, 15,725.75 and 8,732.61 is: 12,056.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,390.31 : 15,725.75 = 8,732.61 : x
  2. Step 2: Convert to fraction form
    11,390.31/15,725.75 = 8,732.61/x
  3. Step 3: Cross multiply
    11,390.31x = 15,725.75 × 8,732.61
  4. Step 4: Simplify right side
    11,390.31x = 137,326,798.04
  5. Step 5: Solve for x
    x = 137,326,798.04/11,390.31
  6. Step 6: Final answer
    x = 12,056.46

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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.