Home / 7,688.10-11,531-2,140.88

Finding the Fourth Proportional to 7,688.10, 11,531 and 2,140.88

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Solution

The fourth proportional to 7,688.10, 11,531 and 2,140.88 is: 3,211.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,688.10 : 11,531 = 2,140.88 : x
  2. Step 2: Convert to fraction form
    7,688.10/11,531 = 2,140.88/x
  3. Step 3: Cross multiply
    7,688.10x = 11,531 × 2,140.88
  4. Step 4: Simplify right side
    7,688.10x = 24,686,487.28
  5. Step 5: Solve for x
    x = 24,686,487.28/7,688.10
  6. Step 6: Final answer
    x = 3,211.00

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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.