Home / 43,142.72-64,715.20-11,977.92

Finding the Fourth Proportional to 43,142.72, 64,715.20 and 11,977.92

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Solution

The fourth proportional to 43,142.72, 64,715.20 and 11,977.92 is: 17,967.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,142.72 : 64,715.20 = 11,977.92 : x
  2. Step 2: Convert to fraction form
    43,142.72/64,715.20 = 11,977.92/x
  3. Step 3: Cross multiply
    43,142.72x = 64,715.20 × 11,977.92
  4. Step 4: Simplify right side
    43,142.72x = 775,153,488.38
  5. Step 5: Solve for x
    x = 775,153,488.38/43,142.72
  6. Step 6: Final answer
    x = 17,967.19

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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.