Home / 10,139.60-15,206.70-3,119.60

Finding the Fourth Proportional to 10,139.60, 15,206.70 and 3,119.60

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Solution

The fourth proportional to 10,139.60, 15,206.70 and 3,119.60 is: 4,678.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,139.60 : 15,206.70 = 3,119.60 : x
  2. Step 2: Convert to fraction form
    10,139.60/15,206.70 = 3,119.60/x
  3. Step 3: Cross multiply
    10,139.60x = 15,206.70 × 3,119.60
  4. Step 4: Simplify right side
    10,139.60x = 47,438,821.32
  5. Step 5: Solve for x
    x = 47,438,821.32/10,139.60
  6. Step 6: Final answer
    x = 4,678.57

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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.