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Finding the Fourth Proportional to 18,123.40, 25,424.60 and 18,123.40

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Solution

The fourth proportional to 18,123.40, 25,424.60 and 18,123.40 is: 25,424.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,123.40 : 25,424.60 = 18,123.40 : x
  2. Step 2: Convert to fraction form
    18,123.40/25,424.60 = 18,123.40/x
  3. Step 3: Cross multiply
    18,123.40x = 25,424.60 × 18,123.40
  4. Step 4: Simplify right side
    18,123.40x = 460,780,195.64
  5. Step 5: Solve for x
    x = 460,780,195.64/18,123.40
  6. Step 6: Final answer
    x = 25,424.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.