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Finding the Fourth Proportional to 28,762.64, 43,105.44 and 21,306.32

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Solution

The fourth proportional to 28,762.64, 43,105.44 and 21,306.32 is: 31,930.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,762.64 : 43,105.44 = 21,306.32 : x
  2. Step 2: Convert to fraction form
    28,762.64/43,105.44 = 21,306.32/x
  3. Step 3: Cross multiply
    28,762.64x = 43,105.44 × 21,306.32
  4. Step 4: Simplify right side
    28,762.64x = 918,418,298.38
  5. Step 5: Solve for x
    x = 918,418,298.38/28,762.64
  6. Step 6: Final answer
    x = 31,930.95

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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.