Home / 13,322.20-19,983.30-7,781.80

Finding the Fourth Proportional to 13,322.20, 19,983.30 and 7,781.80

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Solution

The fourth proportional to 13,322.20, 19,983.30 and 7,781.80 is: 11,672.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,322.20 : 19,983.30 = 7,781.80 : x
  2. Step 2: Convert to fraction form
    13,322.20/19,983.30 = 7,781.80/x
  3. Step 3: Cross multiply
    13,322.20x = 19,983.30 × 7,781.80
  4. Step 4: Simplify right side
    13,322.20x = 155,506,043.94
  5. Step 5: Solve for x
    x = 155,506,043.94/13,322.20
  6. Step 6: Final answer
    x = 11,672.70

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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.