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Finding the Fourth Proportional to 21,608.59, 29,821.01 and 12,656.77

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Solution

The fourth proportional to 21,608.59, 29,821.01 and 12,656.77 is: 17,467.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,608.59 : 29,821.01 = 12,656.77 : x
  2. Step 2: Convert to fraction form
    21,608.59/29,821.01 = 12,656.77/x
  3. Step 3: Cross multiply
    21,608.59x = 29,821.01 × 12,656.77
  4. Step 4: Simplify right side
    21,608.59x = 377,437,664.74
  5. Step 5: Solve for x
    x = 377,437,664.74/21,608.59
  6. Step 6: Final answer
    x = 17,467.02

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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.