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Finding the Fourth Proportional to 17,642.40, 26,420.40 and 16,864.80

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Solution

The fourth proportional to 17,642.40, 26,420.40 and 16,864.80 is: 25,255.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,642.40 : 26,420.40 = 16,864.80 : x
  2. Step 2: Convert to fraction form
    17,642.40/26,420.40 = 16,864.80/x
  3. Step 3: Cross multiply
    17,642.40x = 26,420.40 × 16,864.80
  4. Step 4: Simplify right side
    17,642.40x = 445,574,761.92
  5. Step 5: Solve for x
    x = 445,574,761.92/17,642.40
  6. Step 6: Final answer
    x = 25,255.90

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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.