Home / 15,311.42-21,128.13-8,597.78

Finding the Fourth Proportional to 15,311.42, 21,128.13 and 8,597.78

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Solution

The fourth proportional to 15,311.42, 21,128.13 and 8,597.78 is: 11,864.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.42 : 21,128.13 = 8,597.78 : x
  2. Step 2: Convert to fraction form
    15,311.42/21,128.13 = 8,597.78/x
  3. Step 3: Cross multiply
    15,311.42x = 21,128.13 × 8,597.78
  4. Step 4: Simplify right side
    15,311.42x = 181,655,013.55
  5. Step 5: Solve for x
    x = 181,655,013.55/15,311.42
  6. Step 6: Final answer
    x = 11,864.02

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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.