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Finding the Fourth Proportional to 15,707.08, 21,676.08 and 8,634.16

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Solution

The fourth proportional to 15,707.08, 21,676.08 and 8,634.16 is: 11,915.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,707.08 : 21,676.08 = 8,634.16 : x
  2. Step 2: Convert to fraction form
    15,707.08/21,676.08 = 8,634.16/x
  3. Step 3: Cross multiply
    15,707.08x = 21,676.08 × 8,634.16
  4. Step 4: Simplify right side
    15,707.08x = 187,154,742.89
  5. Step 5: Solve for x
    x = 187,154,742.89/15,707.08
  6. Step 6: Final answer
    x = 11,915.31

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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.