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Finding the Fourth Proportional to 6,988.68, 9,644.40 and 4,004.79

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Solution

The fourth proportional to 6,988.68, 9,644.40 and 4,004.79 is: 5,526.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,988.68 : 9,644.40 = 4,004.79 : x
  2. Step 2: Convert to fraction form
    6,988.68/9,644.40 = 4,004.79/x
  3. Step 3: Cross multiply
    6,988.68x = 9,644.40 × 4,004.79
  4. Step 4: Simplify right side
    6,988.68x = 38,623,796.68
  5. Step 5: Solve for x
    x = 38,623,796.68/6,988.68
  6. Step 6: Final answer
    x = 5,526.62

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1.5x scale

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.