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Finding the Fourth Proportional to 9,871.79, 13,623.04 and 5,395.54

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Solution

The fourth proportional to 9,871.79, 13,623.04 and 5,395.54 is: 7,445.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,871.79 : 13,623.04 = 5,395.54 : x
  2. Step 2: Convert to fraction form
    9,871.79/13,623.04 = 5,395.54/x
  3. Step 3: Cross multiply
    9,871.79x = 13,623.04 × 5,395.54
  4. Step 4: Simplify right side
    9,871.79x = 73,503,657.24
  5. Step 5: Solve for x
    x = 73,503,657.24/9,871.79
  6. Step 6: Final answer
    x = 7,445.83

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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.