Home / 31,838.72-47,739.78-13,131.63

Finding the Fourth Proportional to 31,838.72, 47,739.78 and 13,131.63

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Solution

The fourth proportional to 31,838.72, 47,739.78 and 13,131.63 is: 19,689.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,838.72 : 47,739.78 = 13,131.63 : x
  2. Step 2: Convert to fraction form
    31,838.72/47,739.78 = 13,131.63/x
  3. Step 3: Cross multiply
    31,838.72x = 47,739.78 × 13,131.63
  4. Step 4: Simplify right side
    31,838.72x = 626,901,127.24
  5. Step 5: Solve for x
    x = 626,901,127.24/31,838.72
  6. Step 6: Final answer
    x = 19,689.90

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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.