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Finding the Fourth Proportional to 18,309.78, 25,267.50 and 9,926.28

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Solution

The fourth proportional to 18,309.78, 25,267.50 and 9,926.28 is: 13,698.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,309.78 : 25,267.50 = 9,926.28 : x
  2. Step 2: Convert to fraction form
    18,309.78/25,267.50 = 9,926.28/x
  3. Step 3: Cross multiply
    18,309.78x = 25,267.50 × 9,926.28
  4. Step 4: Simplify right side
    18,309.78x = 250,812,279.90
  5. Step 5: Solve for x
    x = 250,812,279.90/18,309.78
  6. Step 6: Final answer
    x = 13,698.27

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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.