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Finding the Fourth Proportional to 7,045.65, 9,719.80 and 4,060.40

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Solution

The fourth proportional to 7,045.65, 9,719.80 and 4,060.40 is: 5,601.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,045.65 : 9,719.80 = 4,060.40 : x
  2. Step 2: Convert to fraction form
    7,045.65/9,719.80 = 4,060.40/x
  3. Step 3: Cross multiply
    7,045.65x = 9,719.80 × 4,060.40
  4. Step 4: Simplify right side
    7,045.65x = 39,466,217.17
  5. Step 5: Solve for x
    x = 39,466,217.17/7,045.65
  6. Step 6: Final answer
    x = 5,601.50

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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.