Home / 19,455.20-29,209.80-12,478.40

Finding the Fourth Proportional to 19,455.20, 29,209.80 and 12,478.40

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Solution

The fourth proportional to 19,455.20, 29,209.80 and 12,478.40 is: 18,734.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,455.20 : 29,209.80 = 12,478.40 : x
  2. Step 2: Convert to fraction form
    19,455.20/29,209.80 = 12,478.40/x
  3. Step 3: Cross multiply
    19,455.20x = 29,209.80 × 12,478.40
  4. Step 4: Simplify right side
    19,455.20x = 364,491,568.32
  5. Step 5: Solve for x
    x = 364,491,568.32/19,455.20
  6. Step 6: Final answer
    x = 18,734.92

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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.