Home / 12,455.40-18,687.20-5,057.87

Finding the Fourth Proportional to 12,455.40, 18,687.20 and 5,057.87

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Solution

The fourth proportional to 12,455.40, 18,687.20 and 5,057.87 is: 7,588.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.40 : 18,687.20 = 5,057.87 : x
  2. Step 2: Convert to fraction form
    12,455.40/18,687.20 = 5,057.87/x
  3. Step 3: Cross multiply
    12,455.40x = 18,687.20 × 5,057.87
  4. Step 4: Simplify right side
    12,455.40x = 94,517,428.26
  5. Step 5: Solve for x
    x = 94,517,428.26/12,455.40
  6. Step 6: Final answer
    x = 7,588.47

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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.