Home / 12,205.60-18,265.20-8,490.40

Finding the Fourth Proportional to 12,205.60, 18,265.20 and 8,490.40

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Solution

The fourth proportional to 12,205.60, 18,265.20 and 8,490.40 is: 12,705.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,205.60 : 18,265.20 = 8,490.40 : x
  2. Step 2: Convert to fraction form
    12,205.60/18,265.20 = 8,490.40/x
  3. Step 3: Cross multiply
    12,205.60x = 18,265.20 × 8,490.40
  4. Step 4: Simplify right side
    12,205.60x = 155,078,854.08
  5. Step 5: Solve for x
    x = 155,078,854.08/12,205.60
  6. Step 6: Final answer
    x = 12,705.55

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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.