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Finding the Fourth Proportional to 15,707.51, 21,680.15 and 8,997.06

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Solution

The fourth proportional to 15,707.51, 21,680.15 and 8,997.06 is: 12,418.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,707.51 : 21,680.15 = 8,997.06 : x
  2. Step 2: Convert to fraction form
    15,707.51/21,680.15 = 8,997.06/x
  3. Step 3: Cross multiply
    15,707.51x = 21,680.15 × 8,997.06
  4. Step 4: Simplify right side
    15,707.51x = 195,057,610.36
  5. Step 5: Solve for x
    x = 195,057,610.36/15,707.51
  6. Step 6: Final answer
    x = 12,418.11

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Double scale
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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.