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Finding the Fourth Proportional to 7,239.04, 9,986.70 and 5,557.48

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Solution

The fourth proportional to 7,239.04, 9,986.70 and 5,557.48 is: 7,666.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.04 : 9,986.70 = 5,557.48 : x
  2. Step 2: Convert to fraction form
    7,239.04/9,986.70 = 5,557.48/x
  3. Step 3: Cross multiply
    7,239.04x = 9,986.70 × 5,557.48
  4. Step 4: Simplify right side
    7,239.04x = 55,500,885.52
  5. Step 5: Solve for x
    x = 55,500,885.52/7,239.04
  6. Step 6: Final answer
    x = 7,666.88

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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.