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Finding the Fourth Proportional to 18,713.70, 27,987.93 and 16,648.20

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Solution

The fourth proportional to 18,713.70, 27,987.93 and 16,648.20 is: 24,898.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,713.70 : 27,987.93 = 16,648.20 : x
  2. Step 2: Convert to fraction form
    18,713.70/27,987.93 = 16,648.20/x
  3. Step 3: Cross multiply
    18,713.70x = 27,987.93 × 16,648.20
  4. Step 4: Simplify right side
    18,713.70x = 465,948,656.23
  5. Step 5: Solve for x
    x = 465,948,656.23/18,713.70
  6. Step 6: Final answer
    x = 24,898.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.