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Finding the Fourth Proportional to 17,621.20, 26,431.80 and 15,612.40

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Solution

The fourth proportional to 17,621.20, 26,431.80 and 15,612.40 is: 23,418.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,621.20 : 26,431.80 = 15,612.40 : x
  2. Step 2: Convert to fraction form
    17,621.20/26,431.80 = 15,612.40/x
  3. Step 3: Cross multiply
    17,621.20x = 26,431.80 × 15,612.40
  4. Step 4: Simplify right side
    17,621.20x = 412,663,834.32
  5. Step 5: Solve for x
    x = 412,663,834.32/17,621.20
  6. Step 6: Final answer
    x = 23,418.60

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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.