Home / 12,988.40-19,470.26-4,217.18

Finding the Fourth Proportional to 12,988.40, 19,470.26 and 4,217.18

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Solution

The fourth proportional to 12,988.40, 19,470.26 and 4,217.18 is: 6,321.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.40 : 19,470.26 = 4,217.18 : x
  2. Step 2: Convert to fraction form
    12,988.40/19,470.26 = 4,217.18/x
  3. Step 3: Cross multiply
    12,988.40x = 19,470.26 × 4,217.18
  4. Step 4: Simplify right side
    12,988.40x = 82,109,591.07
  5. Step 5: Solve for x
    x = 82,109,591.07/12,988.40
  6. Step 6: Final answer
    x = 6,321.76

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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.