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Finding the Fourth Proportional to 18,411.60, 25,266.72 and 17,245.20

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Solution

The fourth proportional to 18,411.60, 25,266.72 and 17,245.20 is: 23,666.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.60 : 25,266.72 = 17,245.20 : x
  2. Step 2: Convert to fraction form
    18,411.60/25,266.72 = 17,245.20/x
  3. Step 3: Cross multiply
    18,411.60x = 25,266.72 × 17,245.20
  4. Step 4: Simplify right side
    18,411.60x = 435,729,639.74
  5. Step 5: Solve for x
    x = 435,729,639.74/18,411.60
  6. Step 6: Final answer
    x = 23,666.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.