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Finding the Fourth Proportional to 18,859.40, 28,297.20 and 9,625.40

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Solution

The fourth proportional to 18,859.40, 28,297.20 and 9,625.40 is: 14,442.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859.40 : 28,297.20 = 9,625.40 : x
  2. Step 2: Convert to fraction form
    18,859.40/28,297.20 = 9,625.40/x
  3. Step 3: Cross multiply
    18,859.40x = 28,297.20 × 9,625.40
  4. Step 4: Simplify right side
    18,859.40x = 272,371,868.88
  5. Step 5: Solve for x
    x = 272,371,868.88/18,859.40
  6. Step 6: Final answer
    x = 14,442.23

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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.