Home / 10,921.72-15,073.76-6,446.56

Finding the Fourth Proportional to 10,921.72, 15,073.76 and 6,446.56

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Solution

The fourth proportional to 10,921.72, 15,073.76 and 6,446.56 is: 8,897.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.72 : 15,073.76 = 6,446.56 : x
  2. Step 2: Convert to fraction form
    10,921.72/15,073.76 = 6,446.56/x
  3. Step 3: Cross multiply
    10,921.72x = 15,073.76 × 6,446.56
  4. Step 4: Simplify right side
    10,921.72x = 97,173,898.27
  5. Step 5: Solve for x
    x = 97,173,898.27/10,921.72
  6. Step 6: Final answer
    x = 8,897.31

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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.