Home / 7,139.41-10,709.13-1,945.28

Finding the Fourth Proportional to 7,139.41, 10,709.13 and 1,945.28

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Solution

The fourth proportional to 7,139.41, 10,709.13 and 1,945.28 is: 2,917.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.41 : 10,709.13 = 1,945.28 : x
  2. Step 2: Convert to fraction form
    7,139.41/10,709.13 = 1,945.28/x
  3. Step 3: Cross multiply
    7,139.41x = 10,709.13 × 1,945.28
  4. Step 4: Simplify right side
    7,139.41x = 20,832,279.53
  5. Step 5: Solve for x
    x = 20,832,279.53/7,139.41
  6. Step 6: Final answer
    x = 2,917.93

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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.