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Finding the Fourth Proportional to 28,585.58, 42,893.86 and 11,947.08

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Solution

The fourth proportional to 28,585.58, 42,893.86 and 11,947.08 is: 17,927.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,585.58 : 42,893.86 = 11,947.08 : x
  2. Step 2: Convert to fraction form
    28,585.58/42,893.86 = 11,947.08/x
  3. Step 3: Cross multiply
    28,585.58x = 42,893.86 × 11,947.08
  4. Step 4: Simplify right side
    28,585.58x = 512,456,376.93
  5. Step 5: Solve for x
    x = 512,456,376.93/28,585.58
  6. Step 6: Final answer
    x = 17,927.09

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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.