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Finding the Fourth Proportional to 28,095.42, 42,142.95 and 7,318.92

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Solution

The fourth proportional to 28,095.42, 42,142.95 and 7,318.92 is: 10,978.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,095.42 : 42,142.95 = 7,318.92 : x
  2. Step 2: Convert to fraction form
    28,095.42/42,142.95 = 7,318.92/x
  3. Step 3: Cross multiply
    28,095.42x = 42,142.95 × 7,318.92
  4. Step 4: Simplify right side
    28,095.42x = 308,440,879.61
  5. Step 5: Solve for x
    x = 308,440,879.61/28,095.42
  6. Step 6: Final answer
    x = 10,978.33

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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.