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Finding the Fourth Proportional to 18,422.60, 25,423.20 and 10,869.02

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Solution

The fourth proportional to 18,422.60, 25,423.20 and 10,869.02 is: 14,999.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,422.60 : 25,423.20 = 10,869.02 : x
  2. Step 2: Convert to fraction form
    18,422.60/25,423.20 = 10,869.02/x
  3. Step 3: Cross multiply
    18,422.60x = 25,423.20 × 10,869.02
  4. Step 4: Simplify right side
    18,422.60x = 276,325,269.26
  5. Step 5: Solve for x
    x = 276,325,269.26/18,422.60
  6. Step 6: Final answer
    x = 14,999.25

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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.