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Finding the Fourth Proportional to 28,326.38, 42,490.46 and 8,605.10

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Solution

The fourth proportional to 28,326.38, 42,490.46 and 8,605.10 is: 12,907.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,326.38 : 42,490.46 = 8,605.10 : x
  2. Step 2: Convert to fraction form
    28,326.38/42,490.46 = 8,605.10/x
  3. Step 3: Cross multiply
    28,326.38x = 42,490.46 × 8,605.10
  4. Step 4: Simplify right side
    28,326.38x = 365,634,785.08
  5. Step 5: Solve for x
    x = 365,634,785.08/28,326.38
  6. Step 6: Final answer
    x = 12,907.93

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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.