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Finding the Fourth Proportional to 15,808.57, 21,814.52 and 8,734.97

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Solution

The fourth proportional to 15,808.57, 21,814.52 and 8,734.97 is: 12,053.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,808.57 : 21,814.52 = 8,734.97 : x
  2. Step 2: Convert to fraction form
    15,808.57/21,814.52 = 8,734.97/x
  3. Step 3: Cross multiply
    15,808.57x = 21,814.52 × 8,734.97
  4. Step 4: Simplify right side
    15,808.57x = 190,549,188.63
  5. Step 5: Solve for x
    x = 190,549,188.63/15,808.57
  6. Step 6: Final answer
    x = 12,053.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.