Home / 31,815.06-47,649.90-15,186.78

Finding the Fourth Proportional to 31,815.06, 47,649.90 and 15,186.78

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Solution

The fourth proportional to 31,815.06, 47,649.90 and 15,186.78 is: 22,745.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,815.06 : 47,649.90 = 15,186.78 : x
  2. Step 2: Convert to fraction form
    31,815.06/47,649.90 = 15,186.78/x
  3. Step 3: Cross multiply
    31,815.06x = 47,649.90 × 15,186.78
  4. Step 4: Simplify right side
    31,815.06x = 723,648,548.32
  5. Step 5: Solve for x
    x = 723,648,548.32/31,815.06
  6. Step 6: Final answer
    x = 22,745.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.