Home / 13,420,456.71-18,520,754.58-7,619,778.18

Finding the Fourth Proportional to 13,420,456.71, 18,520,754.58 and 7,619,778.18

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Solution

The fourth proportional to 13,420,456.71, 18,520,754.58 and 7,619,778.18 is: 10,515,591.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420,456.71 : 18,520,754.58 = 7,619,778.18 : x
  2. Step 2: Convert to fraction form
    13,420,456.71/18,520,754.58 = 7,619,778.18/x
  3. Step 3: Cross multiply
    13,420,456.71x = 18,520,754.58 × 7,619,778.18
  4. Step 4: Simplify right side
    13,420,456.71x = 141,124,041,625,819.03
  5. Step 5: Solve for x
    x = 141,124,041,625,819.03/13,420,456.71
  6. Step 6: Final answer
    x = 10,515,591.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.