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Finding the Fourth Proportional to 28,298.11, 42,447.11 and 7,521.61

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Solution

The fourth proportional to 28,298.11, 42,447.11 and 7,521.61 is: 11,282.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,298.11 : 42,447.11 = 7,521.61 : x
  2. Step 2: Convert to fraction form
    28,298.11/42,447.11 = 7,521.61/x
  3. Step 3: Cross multiply
    28,298.11x = 42,447.11 × 7,521.61
  4. Step 4: Simplify right side
    28,298.11x = 319,270,394.81
  5. Step 5: Solve for x
    x = 319,270,394.81/28,298.11
  6. Step 6: Final answer
    x = 11,282.39

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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.