Home / 31,512.80-47,269.20-13,984.40

Finding the Fourth Proportional to 31,512.80, 47,269.20 and 13,984.40

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Solution

The fourth proportional to 31,512.80, 47,269.20 and 13,984.40 is: 20,976.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,512.80 : 47,269.20 = 13,984.40 : x
  2. Step 2: Convert to fraction form
    31,512.80/47,269.20 = 13,984.40/x
  3. Step 3: Cross multiply
    31,512.80x = 47,269.20 × 13,984.40
  4. Step 4: Simplify right side
    31,512.80x = 661,031,400.48
  5. Step 5: Solve for x
    x = 661,031,400.48/31,512.80
  6. Step 6: Final answer
    x = 20,976.60

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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.