Home / 14,747.42-20,336.10-11,390.78

Finding the Fourth Proportional to 14,747.42, 20,336.10 and 11,390.78

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Solution

The fourth proportional to 14,747.42, 20,336.10 and 11,390.78 is: 15,707.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,747.42 : 20,336.10 = 11,390.78 : x
  2. Step 2: Convert to fraction form
    14,747.42/20,336.10 = 11,390.78/x
  3. Step 3: Cross multiply
    14,747.42x = 20,336.10 × 11,390.78
  4. Step 4: Simplify right side
    14,747.42x = 231,644,041.16
  5. Step 5: Solve for x
    x = 231,644,041.16/14,747.42
  6. Step 6: Final answer
    x = 15,707.43

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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.