Home / 12,891.40-19,335.30-4,127.20

Finding the Fourth Proportional to 12,891.40, 19,335.30 and 4,127.20

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Solution

The fourth proportional to 12,891.40, 19,335.30 and 4,127.20 is: 6,190.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.40 : 19,335.30 = 4,127.20 : x
  2. Step 2: Convert to fraction form
    12,891.40/19,335.30 = 4,127.20/x
  3. Step 3: Cross multiply
    12,891.40x = 19,335.30 × 4,127.20
  4. Step 4: Simplify right side
    12,891.40x = 79,800,650.16
  5. Step 5: Solve for x
    x = 79,800,650.16/12,891.40
  6. Step 6: Final answer
    x = 6,190.22

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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.