Home / 20,977.42-31,459.11-7,123.18

Finding the Fourth Proportional to 20,977.42, 31,459.11 and 7,123.18

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Solution

The fourth proportional to 20,977.42, 31,459.11 and 7,123.18 is: 10,682.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.42 : 31,459.11 = 7,123.18 : x
  2. Step 2: Convert to fraction form
    20,977.42/31,459.11 = 7,123.18/x
  3. Step 3: Cross multiply
    20,977.42x = 31,459.11 × 7,123.18
  4. Step 4: Simplify right side
    20,977.42x = 224,088,903.17
  5. Step 5: Solve for x
    x = 224,088,903.17/20,977.42
  6. Step 6: Final answer
    x = 10,682.39

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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.