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Finding the Fourth Proportional to 19,223.51, 28,839.11 and 8,130.15

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Solution

The fourth proportional to 19,223.51, 28,839.11 and 8,130.15 is: 12,196.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,223.51 : 28,839.11 = 8,130.15 : x
  2. Step 2: Convert to fraction form
    19,223.51/28,839.11 = 8,130.15/x
  3. Step 3: Cross multiply
    19,223.51x = 28,839.11 × 8,130.15
  4. Step 4: Simplify right side
    19,223.51x = 234,466,249.52
  5. Step 5: Solve for x
    x = 234,466,249.52/19,223.51
  6. Step 6: Final answer
    x = 12,196.85

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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.