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Finding the Fourth Proportional to 21,060.94, 29,069.67 and 13,098.64

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Solution

The fourth proportional to 21,060.94, 29,069.67 and 13,098.64 is: 18,079.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,060.94 : 29,069.67 = 13,098.64 : x
  2. Step 2: Convert to fraction form
    21,060.94/29,069.67 = 13,098.64/x
  3. Step 3: Cross multiply
    21,060.94x = 29,069.67 × 13,098.64
  4. Step 4: Simplify right side
    21,060.94x = 380,773,142.25
  5. Step 5: Solve for x
    x = 380,773,142.25/21,060.94
  6. Step 6: Final answer
    x = 18,079.59

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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.