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Finding the Fourth Proportional to 21,649.92, 32,455.68 and 10,550.40

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Solution

The fourth proportional to 21,649.92, 32,455.68 and 10,550.40 is: 15,816.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,649.92 : 32,455.68 = 10,550.40 : x
  2. Step 2: Convert to fraction form
    21,649.92/32,455.68 = 10,550.40/x
  3. Step 3: Cross multiply
    21,649.92x = 32,455.68 × 10,550.40
  4. Step 4: Simplify right side
    21,649.92x = 342,420,406.27
  5. Step 5: Solve for x
    x = 342,420,406.27/21,649.92
  6. Step 6: Final answer
    x = 15,816.24

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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.