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Finding the Fourth Proportional to 7,133.32, 9,842.88 and 3,988.90

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Solution

The fourth proportional to 7,133.32, 9,842.88 and 3,988.90 is: 5,504.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,133.32 : 9,842.88 = 3,988.90 : x
  2. Step 2: Convert to fraction form
    7,133.32/9,842.88 = 3,988.90/x
  3. Step 3: Cross multiply
    7,133.32x = 9,842.88 × 3,988.90
  4. Step 4: Simplify right side
    7,133.32x = 39,262,264.03
  5. Step 5: Solve for x
    x = 39,262,264.03/7,133.32
  6. Step 6: Final answer
    x = 5,504.07

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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.