Home / 20,971.36-28,981.92-17,188.48

Finding the Fourth Proportional to 20,971.36, 28,981.92 and 17,188.48

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Solution

The fourth proportional to 20,971.36, 28,981.92 and 17,188.48 is: 23,754.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.36 : 28,981.92 = 17,188.48 : x
  2. Step 2: Convert to fraction form
    20,971.36/28,981.92 = 17,188.48/x
  3. Step 3: Cross multiply
    20,971.36x = 28,981.92 × 17,188.48
  4. Step 4: Simplify right side
    20,971.36x = 498,155,152.28
  5. Step 5: Solve for x
    x = 498,155,152.28/20,971.36
  6. Step 6: Final answer
    x = 23,754.07

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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.