Home / 10,072.18-15,109.81-5,139.13

Finding the Fourth Proportional to 10,072.18, 15,109.81 and 5,139.13

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Solution

The fourth proportional to 10,072.18, 15,109.81 and 5,139.13 is: 7,709.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,072.18 : 15,109.81 = 5,139.13 : x
  2. Step 2: Convert to fraction form
    10,072.18/15,109.81 = 5,139.13/x
  3. Step 3: Cross multiply
    10,072.18x = 15,109.81 × 5,139.13
  4. Step 4: Simplify right side
    10,072.18x = 77,651,277.87
  5. Step 5: Solve for x
    x = 77,651,277.87/10,072.18
  6. Step 6: Final answer
    x = 7,709.48

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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.