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Finding the Fourth Proportional to 10,876.70, 15,009.13 and 6,399.58

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Solution

The fourth proportional to 10,876.70, 15,009.13 and 6,399.58 is: 8,831.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,876.70 : 15,009.13 = 6,399.58 : x
  2. Step 2: Convert to fraction form
    10,876.70/15,009.13 = 6,399.58/x
  3. Step 3: Cross multiply
    10,876.70x = 15,009.13 × 6,399.58
  4. Step 4: Simplify right side
    10,876.70x = 96,052,128.17
  5. Step 5: Solve for x
    x = 96,052,128.17/10,876.70
  6. Step 6: Final answer
    x = 8,831.00

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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.