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Finding the Fourth Proportional to 21,608.76, 29,820.08 and 11,672.76

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Solution

The fourth proportional to 21,608.76, 29,820.08 and 11,672.76 is: 16,108.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,608.76 : 29,820.08 = 11,672.76 : x
  2. Step 2: Convert to fraction form
    21,608.76/29,820.08 = 11,672.76/x
  3. Step 3: Cross multiply
    21,608.76x = 29,820.08 × 11,672.76
  4. Step 4: Simplify right side
    21,608.76x = 348,082,637.02
  5. Step 5: Solve for x
    x = 348,082,637.02/21,608.76
  6. Step 6: Final answer
    x = 16,108.40

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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.