Home / 15,122.02-20,868.12-8,406.78

Finding the Fourth Proportional to 15,122.02, 20,868.12 and 8,406.78

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Solution

The fourth proportional to 15,122.02, 20,868.12 and 8,406.78 is: 11,601.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,122.02 : 20,868.12 = 8,406.78 : x
  2. Step 2: Convert to fraction form
    15,122.02/20,868.12 = 8,406.78/x
  3. Step 3: Cross multiply
    15,122.02x = 20,868.12 × 8,406.78
  4. Step 4: Simplify right side
    15,122.02x = 175,433,693.85
  5. Step 5: Solve for x
    x = 175,433,693.85/15,122.02
  6. Step 6: Final answer
    x = 11,601.21

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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.