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Finding the Fourth Proportional to 8,921.04, 12,309.08 and 5,335.50

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Solution

The fourth proportional to 8,921.04, 12,309.08 and 5,335.50 is: 7,361.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.04 : 12,309.08 = 5,335.50 : x
  2. Step 2: Convert to fraction form
    8,921.04/12,309.08 = 5,335.50/x
  3. Step 3: Cross multiply
    8,921.04x = 12,309.08 × 5,335.50
  4. Step 4: Simplify right side
    8,921.04x = 65,675,096.34
  5. Step 5: Solve for x
    x = 65,675,096.34/8,921.04
  6. Step 6: Final answer
    x = 7,361.82

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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.