Home / 31,519.80-47,279.70-13,991.40

Finding the Fourth Proportional to 31,519.80, 47,279.70 and 13,991.40

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Solution

The fourth proportional to 31,519.80, 47,279.70 and 13,991.40 is: 20,987.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,519.80 : 47,279.70 = 13,991.40 : x
  2. Step 2: Convert to fraction form
    31,519.80/47,279.70 = 13,991.40/x
  3. Step 3: Cross multiply
    31,519.80x = 47,279.70 × 13,991.40
  4. Step 4: Simplify right side
    31,519.80x = 661,509,194.58
  5. Step 5: Solve for x
    x = 661,509,194.58/31,519.80
  6. Step 6: Final answer
    x = 20,987.10

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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.