Home / 12,989.35-19,440.28-7,798.87

Finding the Fourth Proportional to 12,989.35, 19,440.28 and 7,798.87

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Solution

The fourth proportional to 12,989.35, 19,440.28 and 7,798.87 is: 11,672.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.35 : 19,440.28 = 7,798.87 : x
  2. Step 2: Convert to fraction form
    12,989.35/19,440.28 = 7,798.87/x
  3. Step 3: Cross multiply
    12,989.35x = 19,440.28 × 7,798.87
  4. Step 4: Simplify right side
    12,989.35x = 151,612,216.48
  5. Step 5: Solve for x
    x = 151,612,216.48/12,989.35
  6. Step 6: Final answer
    x = 11,672.04

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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.