Home / 12,890.92-19,360.14-7,972.60

Finding the Fourth Proportional to 12,890.92, 19,360.14 and 7,972.60

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Solution

The fourth proportional to 12,890.92, 19,360.14 and 7,972.60 is: 11,973.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.92 : 19,360.14 = 7,972.60 : x
  2. Step 2: Convert to fraction form
    12,890.92/19,360.14 = 7,972.60/x
  3. Step 3: Cross multiply
    12,890.92x = 19,360.14 × 7,972.60
  4. Step 4: Simplify right side
    12,890.92x = 154,350,652.16
  5. Step 5: Solve for x
    x = 154,350,652.16/12,890.92
  6. Step 6: Final answer
    x = 11,973.59

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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.