Home / 5,123.12-7,681.48-2,160.02

Finding the Fourth Proportional to 5,123.12, 7,681.48 and 2,160.02

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Solution

The fourth proportional to 5,123.12, 7,681.48 and 2,160.02 is: 3,238.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,123.12 : 7,681.48 = 2,160.02 : x
  2. Step 2: Convert to fraction form
    5,123.12/7,681.48 = 2,160.02/x
  3. Step 3: Cross multiply
    5,123.12x = 7,681.48 × 2,160.02
  4. Step 4: Simplify right side
    5,123.12x = 16,592,164.23
  5. Step 5: Solve for x
    x = 16,592,164.23/5,123.12
  6. Step 6: Final answer
    x = 3,238.69

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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.