Home / 20,430.39-28,175.22-13,252.80

Finding the Fourth Proportional to 20,430.39, 28,175.22 and 13,252.80

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Solution

The fourth proportional to 20,430.39, 28,175.22 and 13,252.80 is: 18,276.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.39 : 28,175.22 = 13,252.80 : x
  2. Step 2: Convert to fraction form
    20,430.39/28,175.22 = 13,252.80/x
  3. Step 3: Cross multiply
    20,430.39x = 28,175.22 × 13,252.80
  4. Step 4: Simplify right side
    20,430.39x = 373,400,555.62
  5. Step 5: Solve for x
    x = 373,400,555.62/20,430.39
  6. Step 6: Final answer
    x = 18,276.72

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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.