Home / 15,520.15-21,418.28-8,806.06

Finding the Fourth Proportional to 15,520.15, 21,418.28 and 8,806.06

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Solution

The fourth proportional to 15,520.15, 21,418.28 and 8,806.06 is: 12,152.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.15 : 21,418.28 = 8,806.06 : x
  2. Step 2: Convert to fraction form
    15,520.15/21,418.28 = 8,806.06/x
  3. Step 3: Cross multiply
    15,520.15x = 21,418.28 × 8,806.06
  4. Step 4: Simplify right side
    15,520.15x = 188,610,658.78
  5. Step 5: Solve for x
    x = 188,610,658.78/15,520.15
  6. Step 6: Final answer
    x = 12,152.63

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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.