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Finding the Fourth Proportional to 15,761.00, 21,751.19 and 8,688.08

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Solution

The fourth proportional to 15,761.00, 21,751.19 and 8,688.08 is: 11,990.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,761.00 : 21,751.19 = 8,688.08 : x
  2. Step 2: Convert to fraction form
    15,761.00/21,751.19 = 8,688.08/x
  3. Step 3: Cross multiply
    15,761.00x = 21,751.19 × 8,688.08
  4. Step 4: Simplify right side
    15,761.00x = 188,975,926.62
  5. Step 5: Solve for x
    x = 188,975,926.62/15,761.00
  6. Step 6: Final answer
    x = 11,990.10

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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.