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Finding the Fourth Proportional to 21,865.70, 32,810.70 and 13,550.24

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Solution

The fourth proportional to 21,865.70, 32,810.70 and 13,550.24 is: 20,332.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,865.70 : 32,810.70 = 13,550.24 : x
  2. Step 2: Convert to fraction form
    21,865.70/32,810.70 = 13,550.24/x
  3. Step 3: Cross multiply
    21,865.70x = 32,810.70 × 13,550.24
  4. Step 4: Simplify right side
    21,865.70x = 444,592,859.57
  5. Step 5: Solve for x
    x = 444,592,859.57/21,865.70
  6. Step 6: Final answer
    x = 20,332.89

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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.