Home / 8,939.28-12,334.40-5,402.68

Finding the Fourth Proportional to 8,939.28, 12,334.40 and 5,402.68

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Solution

The fourth proportional to 8,939.28, 12,334.40 and 5,402.68 is: 7,454.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.28 : 12,334.40 = 5,402.68 : x
  2. Step 2: Convert to fraction form
    8,939.28/12,334.40 = 5,402.68/x
  3. Step 3: Cross multiply
    8,939.28x = 12,334.40 × 5,402.68
  4. Step 4: Simplify right side
    8,939.28x = 66,638,816.19
  5. Step 5: Solve for x
    x = 66,638,816.19/8,939.28
  6. Step 6: Final answer
    x = 7,454.61

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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.