Home / 18,951.90-26,158.31-12,912.13

Finding the Fourth Proportional to 18,951.90, 26,158.31 and 12,912.13

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Solution

The fourth proportional to 18,951.90, 26,158.31 and 12,912.13 is: 17,821.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,951.90 : 26,158.31 = 12,912.13 : x
  2. Step 2: Convert to fraction form
    18,951.90/26,158.31 = 12,912.13/x
  3. Step 3: Cross multiply
    18,951.90x = 26,158.31 × 12,912.13
  4. Step 4: Simplify right side
    18,951.90x = 337,759,499.30
  5. Step 5: Solve for x
    x = 337,759,499.30/18,951.90
  6. Step 6: Final answer
    x = 17,821.93

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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.