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Finding the Fourth Proportional to 18,937.80, 26,131.88 and 10,871.01

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Solution

The fourth proportional to 18,937.80, 26,131.88 and 10,871.01 is: 15,000.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.80 : 26,131.88 = 10,871.01 : x
  2. Step 2: Convert to fraction form
    18,937.80/26,131.88 = 10,871.01/x
  3. Step 3: Cross multiply
    18,937.80x = 26,131.88 × 10,871.01
  4. Step 4: Simplify right side
    18,937.80x = 284,079,955.98
  5. Step 5: Solve for x
    x = 284,079,955.98/18,937.80
  6. Step 6: Final answer
    x = 15,000.68

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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.