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Finding the Fourth Proportional to 28,339.68, 42,515.28 and 9,884.64

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Solution

The fourth proportional to 28,339.68, 42,515.28 and 9,884.64 is: 14,828.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,339.68 : 42,515.28 = 9,884.64 : x
  2. Step 2: Convert to fraction form
    28,339.68/42,515.28 = 9,884.64/x
  3. Step 3: Cross multiply
    28,339.68x = 42,515.28 × 9,884.64
  4. Step 4: Simplify right side
    28,339.68x = 420,248,237.30
  5. Step 5: Solve for x
    x = 420,248,237.30/28,339.68
  6. Step 6: Final answer
    x = 14,828.97

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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.