Home / 12,135.87-18,210.89-5,115.46

Finding the Fourth Proportional to 12,135.87, 18,210.89 and 5,115.46

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Solution

The fourth proportional to 12,135.87, 18,210.89 and 5,115.46 is: 7,676.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.87 : 18,210.89 = 5,115.46 : x
  2. Step 2: Convert to fraction form
    12,135.87/18,210.89 = 5,115.46/x
  3. Step 3: Cross multiply
    12,135.87x = 18,210.89 × 5,115.46
  4. Step 4: Simplify right side
    12,135.87x = 93,156,962.73
  5. Step 5: Solve for x
    x = 93,156,962.73/12,135.87
  6. Step 6: Final answer
    x = 7,676.17

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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.