Home / 7,715.16-11,572.80-1,871.82

Finding the Fourth Proportional to 7,715.16, 11,572.80 and 1,871.82

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Solution

The fourth proportional to 7,715.16, 11,572.80 and 1,871.82 is: 2,807.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.16 : 11,572.80 = 1,871.82 : x
  2. Step 2: Convert to fraction form
    7,715.16/11,572.80 = 1,871.82/x
  3. Step 3: Cross multiply
    7,715.16x = 11,572.80 × 1,871.82
  4. Step 4: Simplify right side
    7,715.16x = 21,662,140.63
  5. Step 5: Solve for x
    x = 21,662,140.63/7,715.16
  6. Step 6: Final answer
    x = 2,807.74

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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.