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Finding the Fourth Proportional to 18,311.93, 25,270.47 and 9,928.43

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Solution

The fourth proportional to 18,311.93, 25,270.47 and 9,928.43 is: 13,701.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,311.93 : 25,270.47 = 9,928.43 : x
  2. Step 2: Convert to fraction form
    18,311.93/25,270.47 = 9,928.43/x
  3. Step 3: Cross multiply
    18,311.93x = 25,270.47 × 9,928.43
  4. Step 4: Simplify right side
    18,311.93x = 250,896,092.46
  5. Step 5: Solve for x
    x = 250,896,092.46/18,311.93
  6. Step 6: Final answer
    x = 13,701.24

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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.