Home / 20,322.57-28,035.67-13,154.79

Finding the Fourth Proportional to 20,322.57, 28,035.67 and 13,154.79

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Solution

The fourth proportional to 20,322.57, 28,035.67 and 13,154.79 is: 18,147.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,322.57 : 28,035.67 = 13,154.79 : x
  2. Step 2: Convert to fraction form
    20,322.57/28,035.67 = 13,154.79/x
  3. Step 3: Cross multiply
    20,322.57x = 28,035.67 × 13,154.79
  4. Step 4: Simplify right side
    20,322.57x = 368,803,388.56
  5. Step 5: Solve for x
    x = 368,803,388.56/20,322.57
  6. Step 6: Final answer
    x = 18,147.48

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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.