Home / 18,777.68-25,913-10,279.70

Finding the Fourth Proportional to 18,777.68, 25,913 and 10,279.70

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Solution

The fourth proportional to 18,777.68, 25,913 and 10,279.70 is: 14,185.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.68 : 25,913 = 10,279.70 : x
  2. Step 2: Convert to fraction form
    18,777.68/25,913 = 10,279.70/x
  3. Step 3: Cross multiply
    18,777.68x = 25,913 × 10,279.70
  4. Step 4: Simplify right side
    18,777.68x = 266,377,866.10
  5. Step 5: Solve for x
    x = 266,377,866.10/18,777.68
  6. Step 6: Final answer
    x = 14,185.88

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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.