Home / 12,780.07-17,635.49-7,114.39

Finding the Fourth Proportional to 12,780.07, 17,635.49 and 7,114.39

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Solution

The fourth proportional to 12,780.07, 17,635.49 and 7,114.39 is: 9,817.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.07 : 17,635.49 = 7,114.39 : x
  2. Step 2: Convert to fraction form
    12,780.07/17,635.49 = 7,114.39/x
  3. Step 3: Cross multiply
    12,780.07x = 17,635.49 × 7,114.39
  4. Step 4: Simplify right side
    12,780.07x = 125,465,718.13
  5. Step 5: Solve for x
    x = 125,465,718.13/12,780.07
  6. Step 6: Final answer
    x = 9,817.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.