Home / 9,319.88-12,861.45-5,128.13

Finding the Fourth Proportional to 9,319.88, 12,861.45 and 5,128.13

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Solution

The fourth proportional to 9,319.88, 12,861.45 and 5,128.13 is: 7,076.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,319.88 : 12,861.45 = 5,128.13 : x
  2. Step 2: Convert to fraction form
    9,319.88/12,861.45 = 5,128.13/x
  3. Step 3: Cross multiply
    9,319.88x = 12,861.45 × 5,128.13
  4. Step 4: Simplify right side
    9,319.88x = 65,955,123.28
  5. Step 5: Solve for x
    x = 65,955,123.28/9,319.88
  6. Step 6: Final answer
    x = 7,076.82

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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.