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Finding the Fourth Proportional to 10,868.40, 16,302.60 and 9,993.60

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Solution

The fourth proportional to 10,868.40, 16,302.60 and 9,993.60 is: 14,990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,868.40 : 16,302.60 = 9,993.60 : x
  2. Step 2: Convert to fraction form
    10,868.40/16,302.60 = 9,993.60/x
  3. Step 3: Cross multiply
    10,868.40x = 16,302.60 × 9,993.60
  4. Step 4: Simplify right side
    10,868.40x = 162,921,663.36
  5. Step 5: Solve for x
    x = 162,921,663.36/10,868.40
  6. Step 6: Final answer
    x = 14,990.40

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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.