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Finding the Fourth Proportional to 28,118.95, 42,178.47 and 8,395.95

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Solution

The fourth proportional to 28,118.95, 42,178.47 and 8,395.95 is: 12,593.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,118.95 : 42,178.47 = 8,395.95 : x
  2. Step 2: Convert to fraction form
    28,118.95/42,178.47 = 8,395.95/x
  3. Step 3: Cross multiply
    28,118.95x = 42,178.47 × 8,395.95
  4. Step 4: Simplify right side
    28,118.95x = 354,128,325.20
  5. Step 5: Solve for x
    x = 354,128,325.20/28,118.95
  6. Step 6: Final answer
    x = 12,593.94

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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.