Home / 12,947.40-19,387.38-8,992.80

Finding the Fourth Proportional to 12,947.40, 19,387.38 and 8,992.80

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Solution

The fourth proportional to 12,947.40, 19,387.38 and 8,992.80 is: 13,465.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.40 : 19,387.38 = 8,992.80 : x
  2. Step 2: Convert to fraction form
    12,947.40/19,387.38 = 8,992.80/x
  3. Step 3: Cross multiply
    12,947.40x = 19,387.38 × 8,992.80
  4. Step 4: Simplify right side
    12,947.40x = 174,346,830.86
  5. Step 5: Solve for x
    x = 174,346,830.86/12,947.40
  6. Step 6: Final answer
    x = 13,465.78

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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.