Home / 12,377.40-17,086.80-8,345.20

Finding the Fourth Proportional to 12,377.40, 17,086.80 and 8,345.20

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Solution

The fourth proportional to 12,377.40, 17,086.80 and 8,345.20 is: 11,520.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,377.40 : 17,086.80 = 8,345.20 : x
  2. Step 2: Convert to fraction form
    12,377.40/17,086.80 = 8,345.20/x
  3. Step 3: Cross multiply
    12,377.40x = 17,086.80 × 8,345.20
  4. Step 4: Simplify right side
    12,377.40x = 142,592,763.36
  5. Step 5: Solve for x
    x = 142,592,763.36/12,377.40
  6. Step 6: Final answer
    x = 11,520.41

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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.