Home / 12,977.23-17,909.24-7,939.87

Finding the Fourth Proportional to 12,977.23, 17,909.24 and 7,939.87

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Solution

The fourth proportional to 12,977.23, 17,909.24 and 7,939.87 is: 10,957.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,977.23 : 17,909.24 = 7,939.87 : x
  2. Step 2: Convert to fraction form
    12,977.23/17,909.24 = 7,939.87/x
  3. Step 3: Cross multiply
    12,977.23x = 17,909.24 × 7,939.87
  4. Step 4: Simplify right side
    12,977.23x = 142,197,037.40
  5. Step 5: Solve for x
    x = 142,197,037.40/12,977.23
  6. Step 6: Final answer
    x = 10,957.43

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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.