Home / 20,571.76-28,389.04-11,140.32

Finding the Fourth Proportional to 20,571.76, 28,389.04 and 11,140.32

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Solution

The fourth proportional to 20,571.76, 28,389.04 and 11,140.32 is: 15,373.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.76 : 28,389.04 = 11,140.32 : x
  2. Step 2: Convert to fraction form
    20,571.76/28,389.04 = 11,140.32/x
  3. Step 3: Cross multiply
    20,571.76x = 28,389.04 × 11,140.32
  4. Step 4: Simplify right side
    20,571.76x = 316,262,990.09
  5. Step 5: Solve for x
    x = 316,262,990.09/20,571.76
  6. Step 6: Final answer
    x = 15,373.65

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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.