Home / 12,942.30-19,400.65-5,140.70

Finding the Fourth Proportional to 12,942.30, 19,400.65 and 5,140.70

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Solution

The fourth proportional to 12,942.30, 19,400.65 and 5,140.70 is: 7,705.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,942.30 : 19,400.65 = 5,140.70 : x
  2. Step 2: Convert to fraction form
    12,942.30/19,400.65 = 5,140.70/x
  3. Step 3: Cross multiply
    12,942.30x = 19,400.65 × 5,140.70
  4. Step 4: Simplify right side
    12,942.30x = 99,732,921.46
  5. Step 5: Solve for x
    x = 99,732,921.46/12,942.30
  6. Step 6: Final answer
    x = 7,705.97

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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.