Home / 13,420,458.71-18,520,757.34-7,619,780.18

Finding the Fourth Proportional to 13,420,458.71, 18,520,757.34 and 7,619,780.18

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Solution

The fourth proportional to 13,420,458.71, 18,520,757.34 and 7,619,780.18 is: 10,515,594.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420,458.71 : 18,520,757.34 = 7,619,780.18 : x
  2. Step 2: Convert to fraction form
    13,420,458.71/18,520,757.34 = 7,619,780.18/x
  3. Step 3: Cross multiply
    13,420,458.71x = 18,520,757.34 × 7,619,780.18
  4. Step 4: Simplify right side
    13,420,458.71x = 141,124,099,697,921.50
  5. Step 5: Solve for x
    x = 141,124,099,697,921.50/13,420,458.71
  6. Step 6: Final answer
    x = 10,515,594.34

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Double scale
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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.