Home / 15,486.42-21,369.72-8,770.71

Finding the Fourth Proportional to 15,486.42, 21,369.72 and 8,770.71

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Solution

The fourth proportional to 15,486.42, 21,369.72 and 8,770.71 is: 12,102.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.42 : 21,369.72 = 8,770.71 : x
  2. Step 2: Convert to fraction form
    15,486.42/21,369.72 = 8,770.71/x
  3. Step 3: Cross multiply
    15,486.42x = 21,369.72 × 8,770.71
  4. Step 4: Simplify right side
    15,486.42x = 187,427,729.93
  5. Step 5: Solve for x
    x = 187,427,729.93/15,486.42
  6. Step 6: Final answer
    x = 12,102.71

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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.