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Finding the Fourth Proportional to 11,347.80, 15,658.92 and 8,365.28

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Solution

The fourth proportional to 11,347.80, 15,658.92 and 8,365.28 is: 11,543.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,347.80 : 15,658.92 = 8,365.28 : x
  2. Step 2: Convert to fraction form
    11,347.80/15,658.92 = 8,365.28/x
  3. Step 3: Cross multiply
    11,347.80x = 15,658.92 × 8,365.28
  4. Step 4: Simplify right side
    11,347.80x = 130,991,172.00
  5. Step 5: Solve for x
    x = 130,991,172.00/11,347.80
  6. Step 6: Final answer
    x = 11,543.31

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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.