Home / 31,980.12-47,960.40-15,331.56

Finding the Fourth Proportional to 31,980.12, 47,960.40 and 15,331.56

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Solution

The fourth proportional to 31,980.12, 47,960.40 and 15,331.56 is: 22,992.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,980.12 : 47,960.40 = 15,331.56 : x
  2. Step 2: Convert to fraction form
    31,980.12/47,960.40 = 15,331.56/x
  3. Step 3: Cross multiply
    31,980.12x = 47,960.40 × 15,331.56
  4. Step 4: Simplify right side
    31,980.12x = 735,307,750.22
  5. Step 5: Solve for x
    x = 735,307,750.22/31,980.12
  6. Step 6: Final answer
    x = 22,992.65

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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.