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Finding the Fourth Proportional to 21,656.54, 29,886.02 and 11,720.54

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Solution

The fourth proportional to 21,656.54, 29,886.02 and 11,720.54 is: 16,174.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.54 : 29,886.02 = 11,720.54 : x
  2. Step 2: Convert to fraction form
    21,656.54/29,886.02 = 11,720.54/x
  3. Step 3: Cross multiply
    21,656.54x = 29,886.02 × 11,720.54
  4. Step 4: Simplify right side
    21,656.54x = 350,280,084.82
  5. Step 5: Solve for x
    x = 350,280,084.82/21,656.54
  6. Step 6: Final answer
    x = 16,174.34

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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.