Home / 20,123.68-30,186.60-8,437.36

Finding the Fourth Proportional to 20,123.68, 30,186.60 and 8,437.36

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Solution

The fourth proportional to 20,123.68, 30,186.60 and 8,437.36 is: 12,656.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.68 : 30,186.60 = 8,437.36 : x
  2. Step 2: Convert to fraction form
    20,123.68/30,186.60 = 8,437.36/x
  3. Step 3: Cross multiply
    20,123.68x = 30,186.60 × 8,437.36
  4. Step 4: Simplify right side
    20,123.68x = 254,695,211.38
  5. Step 5: Solve for x
    x = 254,695,211.38/20,123.68
  6. Step 6: Final answer
    x = 12,656.49

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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.