Home / 10,478.15-15,719.16-3,458.65

Finding the Fourth Proportional to 10,478.15, 15,719.16 and 3,458.65

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Solution

The fourth proportional to 10,478.15, 15,719.16 and 3,458.65 is: 5,188.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,478.15 : 15,719.16 = 3,458.65 : x
  2. Step 2: Convert to fraction form
    10,478.15/15,719.16 = 3,458.65/x
  3. Step 3: Cross multiply
    10,478.15x = 15,719.16 × 3,458.65
  4. Step 4: Simplify right side
    10,478.15x = 54,367,075.88
  5. Step 5: Solve for x
    x = 54,367,075.88/10,478.15
  6. Step 6: Final answer
    x = 5,188.62

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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.