Home / 12,478.40-18,722.45-5,910.11

Finding the Fourth Proportional to 12,478.40, 18,722.45 and 5,910.11

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Solution

The fourth proportional to 12,478.40, 18,722.45 and 5,910.11 is: 8,867.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.40 : 18,722.45 = 5,910.11 : x
  2. Step 2: Convert to fraction form
    12,478.40/18,722.45 = 5,910.11/x
  3. Step 3: Cross multiply
    12,478.40x = 18,722.45 × 5,910.11
  4. Step 4: Simplify right side
    12,478.40x = 110,651,660.13
  5. Step 5: Solve for x
    x = 110,651,660.13/12,478.40
  6. Step 6: Final answer
    x = 8,867.46

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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.