Home / 20,751.28-28,637.12-11,320.16

Finding the Fourth Proportional to 20,751.28, 28,637.12 and 11,320.16

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Solution

The fourth proportional to 20,751.28, 28,637.12 and 11,320.16 is: 15,622.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.28 : 28,637.12 = 11,320.16 : x
  2. Step 2: Convert to fraction form
    20,751.28/28,637.12 = 11,320.16/x
  3. Step 3: Cross multiply
    20,751.28x = 28,637.12 × 11,320.16
  4. Step 4: Simplify right side
    20,751.28x = 324,176,780.34
  5. Step 5: Solve for x
    x = 324,176,780.34/20,751.28
  6. Step 6: Final answer
    x = 15,622.01

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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.