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Finding the Fourth Proportional to 28,251.92, 42,378.09 and 13,053.08

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Solution

The fourth proportional to 28,251.92, 42,378.09 and 13,053.08 is: 19,579.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,251.92 : 42,378.09 = 13,053.08 : x
  2. Step 2: Convert to fraction form
    28,251.92/42,378.09 = 13,053.08/x
  3. Step 3: Cross multiply
    28,251.92x = 42,378.09 × 13,053.08
  4. Step 4: Simplify right side
    28,251.92x = 553,164,656.01
  5. Step 5: Solve for x
    x = 553,164,656.01/28,251.92
  6. Step 6: Final answer
    x = 19,579.72

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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.