Home / 10,139.46-15,210.65-3,120.07

Finding the Fourth Proportional to 10,139.46, 15,210.65 and 3,120.07

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Solution

The fourth proportional to 10,139.46, 15,210.65 and 3,120.07 is: 4,680.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,139.46 : 15,210.65 = 3,120.07 : x
  2. Step 2: Convert to fraction form
    10,139.46/15,210.65 = 3,120.07/x
  3. Step 3: Cross multiply
    10,139.46x = 15,210.65 × 3,120.07
  4. Step 4: Simplify right side
    10,139.46x = 47,458,292.75
  5. Step 5: Solve for x
    x = 47,458,292.75/10,139.46
  6. Step 6: Final answer
    x = 4,680.55

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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.