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Finding the Fourth Proportional to 17,012.80, 25,519.20 and 15,911.20

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Solution

The fourth proportional to 17,012.80, 25,519.20 and 15,911.20 is: 23,866.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,012.80 : 25,519.20 = 15,911.20 : x
  2. Step 2: Convert to fraction form
    17,012.80/25,519.20 = 15,911.20/x
  3. Step 3: Cross multiply
    17,012.80x = 25,519.20 × 15,911.20
  4. Step 4: Simplify right side
    17,012.80x = 406,041,095.04
  5. Step 5: Solve for x
    x = 406,041,095.04/17,012.80
  6. Step 6: Final answer
    x = 23,866.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.