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Finding the Fourth Proportional to 12,641.67, 17,438.49 and 7,335.90

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Solution

The fourth proportional to 12,641.67, 17,438.49 and 7,335.90 is: 10,119.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,641.67 : 17,438.49 = 7,335.90 : x
  2. Step 2: Convert to fraction form
    12,641.67/17,438.49 = 7,335.90/x
  3. Step 3: Cross multiply
    12,641.67x = 17,438.49 × 7,335.90
  4. Step 4: Simplify right side
    12,641.67x = 127,927,018.79
  5. Step 5: Solve for x
    x = 127,927,018.79/12,641.67
  6. Step 6: Final answer
    x = 10,119.47

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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.