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Finding the Fourth Proportional to 19,165.78, 28,753.28 and 8,075.64

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Solution

The fourth proportional to 19,165.78, 28,753.28 and 8,075.64 is: 12,115.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,165.78 : 28,753.28 = 8,075.64 : x
  2. Step 2: Convert to fraction form
    19,165.78/28,753.28 = 8,075.64/x
  3. Step 3: Cross multiply
    19,165.78x = 28,753.28 × 8,075.64
  4. Step 4: Simplify right side
    19,165.78x = 232,201,158.29
  5. Step 5: Solve for x
    x = 232,201,158.29/19,165.78
  6. Step 6: Final answer
    x = 12,115.41

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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.