Home / 12,729.66-19,086.80-5,708.40

Finding the Fourth Proportional to 12,729.66, 19,086.80 and 5,708.40

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Solution

The fourth proportional to 12,729.66, 19,086.80 and 5,708.40 is: 8,559.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,729.66 : 19,086.80 = 5,708.40 : x
  2. Step 2: Convert to fraction form
    12,729.66/19,086.80 = 5,708.40/x
  3. Step 3: Cross multiply
    12,729.66x = 19,086.80 × 5,708.40
  4. Step 4: Simplify right side
    12,729.66x = 108,955,060.58
  5. Step 5: Solve for x
    x = 108,955,060.58/12,729.66
  6. Step 6: Final answer
    x = 8,559.15

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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.