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Finding the Fourth Proportional to 13,699.92, 20,557.20 and 5,908.08

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Solution

The fourth proportional to 13,699.92, 20,557.20 and 5,908.08 is: 8,865.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,699.92 : 20,557.20 = 5,908.08 : x
  2. Step 2: Convert to fraction form
    13,699.92/20,557.20 = 5,908.08/x
  3. Step 3: Cross multiply
    13,699.92x = 20,557.20 × 5,908.08
  4. Step 4: Simplify right side
    13,699.92x = 121,453,582.18
  5. Step 5: Solve for x
    x = 121,453,582.18/13,699.92
  6. Step 6: Final answer
    x = 8,865.28

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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.