Home / 31,478.19-47,217.30-30,111.54

Finding the Fourth Proportional to 31,478.19, 47,217.30 and 30,111.54

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Solution

The fourth proportional to 31,478.19, 47,217.30 and 30,111.54 is: 45,167.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,478.19 : 47,217.30 = 30,111.54 : x
  2. Step 2: Convert to fraction form
    31,478.19/47,217.30 = 30,111.54/x
  3. Step 3: Cross multiply
    31,478.19x = 47,217.30 × 30,111.54
  4. Step 4: Simplify right side
    31,478.19x = 1,421,785,381.56
  5. Step 5: Solve for x
    x = 1,421,785,381.56/31,478.19
  6. Step 6: Final answer
    x = 45,167.32

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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.