Home / 12,920.60-19,386.30-4,158.20

Finding the Fourth Proportional to 12,920.60, 19,386.30 and 4,158.20

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Solution

The fourth proportional to 12,920.60, 19,386.30 and 4,158.20 is: 6,239.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.60 : 19,386.30 = 4,158.20 : x
  2. Step 2: Convert to fraction form
    12,920.60/19,386.30 = 4,158.20/x
  3. Step 3: Cross multiply
    12,920.60x = 19,386.30 × 4,158.20
  4. Step 4: Simplify right side
    12,920.60x = 80,612,112.66
  5. Step 5: Solve for x
    x = 80,612,112.66/12,920.60
  6. Step 6: Final answer
    x = 6,239.04

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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.