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Finding the Fourth Proportional to 18,683.20, 25,758.02 and 15,484.50

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Solution

The fourth proportional to 18,683.20, 25,758.02 and 15,484.50 is: 21,348.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683.20 : 25,758.02 = 15,484.50 : x
  2. Step 2: Convert to fraction form
    18,683.20/25,758.02 = 15,484.50/x
  3. Step 3: Cross multiply
    18,683.20x = 25,758.02 × 15,484.50
  4. Step 4: Simplify right side
    18,683.20x = 398,850,060.69
  5. Step 5: Solve for x
    x = 398,850,060.69/18,683.20
  6. Step 6: Final answer
    x = 21,348.06

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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.