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Finding the Fourth Proportional to 15,705.18, 21,673.08 and 8,632.08

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Solution

The fourth proportional to 15,705.18, 21,673.08 and 8,632.08 is: 11,912.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,705.18 : 21,673.08 = 8,632.08 : x
  2. Step 2: Convert to fraction form
    15,705.18/21,673.08 = 8,632.08/x
  3. Step 3: Cross multiply
    15,705.18x = 21,673.08 × 8,632.08
  4. Step 4: Simplify right side
    15,705.18x = 187,083,760.41
  5. Step 5: Solve for x
    x = 187,083,760.41/15,705.18
  6. Step 6: Final answer
    x = 11,912.23

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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.