Home / 20,707.01-28,571.72-13,154.57

Finding the Fourth Proportional to 20,707.01, 28,571.72 and 13,154.57

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Solution

The fourth proportional to 20,707.01, 28,571.72 and 13,154.57 is: 18,150.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.01 : 28,571.72 = 13,154.57 : x
  2. Step 2: Convert to fraction form
    20,707.01/28,571.72 = 13,154.57/x
  3. Step 3: Cross multiply
    20,707.01x = 28,571.72 × 13,154.57
  4. Step 4: Simplify right side
    20,707.01x = 375,848,690.76
  5. Step 5: Solve for x
    x = 375,848,690.76/20,707.01
  6. Step 6: Final answer
    x = 18,150.79

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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.