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Finding the Fourth Proportional to 10,263.70, 15,379.12 and 9,279.55

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Solution

The fourth proportional to 10,263.70, 15,379.12 and 9,279.55 is: 13,904.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,263.70 : 15,379.12 = 9,279.55 : x
  2. Step 2: Convert to fraction form
    10,263.70/15,379.12 = 9,279.55/x
  3. Step 3: Cross multiply
    10,263.70x = 15,379.12 × 9,279.55
  4. Step 4: Simplify right side
    10,263.70x = 142,711,313.00
  5. Step 5: Solve for x
    x = 142,711,313.00/10,263.70
  6. Step 6: Final answer
    x = 13,904.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.