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Finding the Fourth Proportional to 28,005.66, 42,002.46 and 8,279.82

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Solution

The fourth proportional to 28,005.66, 42,002.46 and 8,279.82 is: 12,417.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,005.66 : 42,002.46 = 8,279.82 : x
  2. Step 2: Convert to fraction form
    28,005.66/42,002.46 = 8,279.82/x
  3. Step 3: Cross multiply
    28,005.66x = 42,002.46 × 8,279.82
  4. Step 4: Simplify right side
    28,005.66x = 347,772,808.36
  5. Step 5: Solve for x
    x = 347,772,808.36/28,005.66
  6. Step 6: Final answer
    x = 12,417.95

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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.