Home / 20,353.50-28,088.73-11,400.81

Finding the Fourth Proportional to 20,353.50, 28,088.73 and 11,400.81

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Solution

The fourth proportional to 20,353.50, 28,088.73 and 11,400.81 is: 15,733.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,353.50 : 28,088.73 = 11,400.81 : x
  2. Step 2: Convert to fraction form
    20,353.50/28,088.73 = 11,400.81/x
  3. Step 3: Cross multiply
    20,353.50x = 28,088.73 × 11,400.81
  4. Step 4: Simplify right side
    20,353.50x = 320,234,273.87
  5. Step 5: Solve for x
    x = 320,234,273.87/20,353.50
  6. Step 6: Final answer
    x = 15,733.62

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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.