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Finding the Fourth Proportional to 5,124.65, 7,069.43 and 3,945.29

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Solution

The fourth proportional to 5,124.65, 7,069.43 and 3,945.29 is: 5,442.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,124.65 : 7,069.43 = 3,945.29 : x
  2. Step 2: Convert to fraction form
    5,124.65/7,069.43 = 3,945.29/x
  3. Step 3: Cross multiply
    5,124.65x = 7,069.43 × 3,945.29
  4. Step 4: Simplify right side
    5,124.65x = 27,890,931.76
  5. Step 5: Solve for x
    x = 27,890,931.76/5,124.65
  6. Step 6: Final answer
    x = 5,442.50

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Why These Related Problems?

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