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Finding the Fourth Proportional to 7,983.58, 11,988.71 and 4,988.59

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Solution

The fourth proportional to 7,983.58, 11,988.71 and 4,988.59 is: 7,491.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,983.58 : 11,988.71 = 4,988.59 : x
  2. Step 2: Convert to fraction form
    7,983.58/11,988.71 = 4,988.59/x
  3. Step 3: Cross multiply
    7,983.58x = 11,988.71 × 4,988.59
  4. Step 4: Simplify right side
    7,983.58x = 59,806,673.93
  5. Step 5: Solve for x
    x = 59,806,673.93/7,983.58
  6. Step 6: Final answer
    x = 7,491.21

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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.