Home / 7,715.29-11,572.81-1,871.86

Finding the Fourth Proportional to 7,715.29, 11,572.81 and 1,871.86

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Solution

The fourth proportional to 7,715.29, 11,572.81 and 1,871.86 is: 2,807.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.29 : 11,572.81 = 1,871.86 : x
  2. Step 2: Convert to fraction form
    7,715.29/11,572.81 = 1,871.86/x
  3. Step 3: Cross multiply
    7,715.29x = 11,572.81 × 1,871.86
  4. Step 4: Simplify right side
    7,715.29x = 21,662,680.13
  5. Step 5: Solve for x
    x = 21,662,680.13/7,715.29
  6. Step 6: Final answer
    x = 2,807.76

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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.