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Finding the Fourth Proportional to 28,312.78, 42,469.01 and 7,252.78

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Solution

The fourth proportional to 28,312.78, 42,469.01 and 7,252.78 is: 10,879.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,312.78 : 42,469.01 = 7,252.78 : x
  2. Step 2: Convert to fraction form
    28,312.78/42,469.01 = 7,252.78/x
  3. Step 3: Cross multiply
    28,312.78x = 42,469.01 × 7,252.78
  4. Step 4: Simplify right side
    28,312.78x = 308,018,386.35
  5. Step 5: Solve for x
    x = 308,018,386.35/28,312.78
  6. Step 6: Final answer
    x = 10,879.13

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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.