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Finding the Fourth Proportional to 7,681.52, 11,523.78 and 3,521.63

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Solution

The fourth proportional to 7,681.52, 11,523.78 and 3,521.63 is: 5,283.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,681.52 : 11,523.78 = 3,521.63 : x
  2. Step 2: Convert to fraction form
    7,681.52/11,523.78 = 3,521.63/x
  3. Step 3: Cross multiply
    7,681.52x = 11,523.78 × 3,521.63
  4. Step 4: Simplify right side
    7,681.52x = 40,582,489.36
  5. Step 5: Solve for x
    x = 40,582,489.36/7,681.52
  6. Step 6: Final answer
    x = 5,283.13

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1.5x scale

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.