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Finding the Fourth Proportional to 5,377.68, 7,421 and 2,987.76

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Solution

The fourth proportional to 5,377.68, 7,421 and 2,987.76 is: 4,123.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,377.68 : 7,421 = 2,987.76 : x
  2. Step 2: Convert to fraction form
    5,377.68/7,421 = 2,987.76/x
  3. Step 3: Cross multiply
    5,377.68x = 7,421 × 2,987.76
  4. Step 4: Simplify right side
    5,377.68x = 22,172,166.96
  5. Step 5: Solve for x
    x = 22,172,166.96/5,377.68
  6. Step 6: Final answer
    x = 4,123.00

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.