Home / 20,397.78-28,154.88-13,325.22

Finding the Fourth Proportional to 20,397.78, 28,154.88 and 13,325.22

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Solution

The fourth proportional to 20,397.78, 28,154.88 and 13,325.22 is: 18,392.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,397.78 : 28,154.88 = 13,325.22 : x
  2. Step 2: Convert to fraction form
    20,397.78/28,154.88 = 13,325.22/x
  3. Step 3: Cross multiply
    20,397.78x = 28,154.88 × 13,325.22
  4. Step 4: Simplify right side
    20,397.78x = 375,169,970.07
  5. Step 5: Solve for x
    x = 375,169,970.07/20,397.78
  6. Step 6: Final answer
    x = 18,392.69

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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.