Home / 31,820.40-47,730.60-18,516.15

Finding the Fourth Proportional to 31,820.40, 47,730.60 and 18,516.15

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Solution

The fourth proportional to 31,820.40, 47,730.60 and 18,516.15 is: 27,774.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,820.40 : 47,730.60 = 18,516.15 : x
  2. Step 2: Convert to fraction form
    31,820.40/47,730.60 = 18,516.15/x
  3. Step 3: Cross multiply
    31,820.40x = 47,730.60 × 18,516.15
  4. Step 4: Simplify right side
    31,820.40x = 883,786,949.19
  5. Step 5: Solve for x
    x = 883,786,949.19/31,820.40
  6. Step 6: Final answer
    x = 27,774.23

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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.