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Finding the Fourth Proportional to 18,275.70, 25,220.50 and 9,892.20

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Solution

The fourth proportional to 18,275.70, 25,220.50 and 9,892.20 is: 13,651.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,275.70 : 25,220.50 = 9,892.20 : x
  2. Step 2: Convert to fraction form
    18,275.70/25,220.50 = 9,892.20/x
  3. Step 3: Cross multiply
    18,275.70x = 25,220.50 × 9,892.20
  4. Step 4: Simplify right side
    18,275.70x = 249,486,230.10
  5. Step 5: Solve for x
    x = 249,486,230.10/18,275.70
  6. Step 6: Final answer
    x = 13,651.25

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Half scale
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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.