Home / 15,471.36-21,350.34-8,397.72

Finding the Fourth Proportional to 15,471.36, 21,350.34 and 8,397.72

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Solution

The fourth proportional to 15,471.36, 21,350.34 and 8,397.72 is: 11,588.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,471.36 : 21,350.34 = 8,397.72 : x
  2. Step 2: Convert to fraction form
    15,471.36/21,350.34 = 8,397.72/x
  3. Step 3: Cross multiply
    15,471.36x = 21,350.34 × 8,397.72
  4. Step 4: Simplify right side
    15,471.36x = 179,294,177.22
  5. Step 5: Solve for x
    x = 179,294,177.22/15,471.36
  6. Step 6: Final answer
    x = 11,588.78

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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.