Home / 12,357.20-18,535.80-8,440.40

Finding the Fourth Proportional to 12,357.20, 18,535.80 and 8,440.40

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Solution

The fourth proportional to 12,357.20, 18,535.80 and 8,440.40 is: 12,660.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,357.20 : 18,535.80 = 8,440.40 : x
  2. Step 2: Convert to fraction form
    12,357.20/18,535.80 = 8,440.40/x
  3. Step 3: Cross multiply
    12,357.20x = 18,535.80 × 8,440.40
  4. Step 4: Simplify right side
    12,357.20x = 156,449,566.32
  5. Step 5: Solve for x
    x = 156,449,566.32/12,357.20
  6. Step 6: Final answer
    x = 12,660.60

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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.