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Finding the Fourth Proportional to 7,889.98, 11,821.04 and 7,031.92

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Solution

The fourth proportional to 7,889.98, 11,821.04 and 7,031.92 is: 10,535.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,889.98 : 11,821.04 = 7,031.92 : x
  2. Step 2: Convert to fraction form
    7,889.98/11,821.04 = 7,031.92/x
  3. Step 3: Cross multiply
    7,889.98x = 11,821.04 × 7,031.92
  4. Step 4: Simplify right side
    7,889.98x = 83,124,607.60
  5. Step 5: Solve for x
    x = 83,124,607.60/7,889.98
  6. Step 6: Final answer
    x = 10,535.46

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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.