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Finding the Fourth Proportional to 15,386.88, 21,233.92 and 8,313.31

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Solution

The fourth proportional to 15,386.88, 21,233.92 and 8,313.31 is: 11,472.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,386.88 : 21,233.92 = 8,313.31 : x
  2. Step 2: Convert to fraction form
    15,386.88/21,233.92 = 8,313.31/x
  3. Step 3: Cross multiply
    15,386.88x = 21,233.92 × 8,313.31
  4. Step 4: Simplify right side
    15,386.88x = 176,524,159.48
  5. Step 5: Solve for x
    x = 176,524,159.48/15,386.88
  6. Step 6: Final answer
    x = 11,472.38

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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.