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Finding the Fourth Proportional to 9,871.92, 13,626.36 and 9,543.60

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Solution

The fourth proportional to 9,871.92, 13,626.36 and 9,543.60 is: 13,173.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,871.92 : 13,626.36 = 9,543.60 : x
  2. Step 2: Convert to fraction form
    9,871.92/13,626.36 = 9,543.60/x
  3. Step 3: Cross multiply
    9,871.92x = 13,626.36 × 9,543.60
  4. Step 4: Simplify right side
    9,871.92x = 130,044,529.30
  5. Step 5: Solve for x
    x = 130,044,529.30/9,871.92
  6. Step 6: Final answer
    x = 13,173.17

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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.