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Finding the Fourth Proportional to 15,900.75, 21,945.06 and 9,613.13

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Solution

The fourth proportional to 15,900.75, 21,945.06 and 9,613.13 is: 13,267.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,900.75 : 21,945.06 = 9,613.13 : x
  2. Step 2: Convert to fraction form
    15,900.75/21,945.06 = 9,613.13/x
  3. Step 3: Cross multiply
    15,900.75x = 21,945.06 × 9,613.13
  4. Step 4: Simplify right side
    15,900.75x = 210,960,604.91
  5. Step 5: Solve for x
    x = 210,960,604.91/15,900.75
  6. Step 6: Final answer
    x = 13,267.34

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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.