Home / 31,405.08-47,109.24-8,031.72

Finding the Fourth Proportional to 31,405.08, 47,109.24 and 8,031.72

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Solution

The fourth proportional to 31,405.08, 47,109.24 and 8,031.72 is: 12,047.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,405.08 : 47,109.24 = 8,031.72 : x
  2. Step 2: Convert to fraction form
    31,405.08/47,109.24 = 8,031.72/x
  3. Step 3: Cross multiply
    31,405.08x = 47,109.24 × 8,031.72
  4. Step 4: Simplify right side
    31,405.08x = 378,368,225.09
  5. Step 5: Solve for x
    x = 378,368,225.09/31,405.08
  6. Step 6: Final answer
    x = 12,047.99

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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.