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Finding the Fourth Proportional to 25,690.96, 35,402.16 and 21,658.16

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Solution

The fourth proportional to 25,690.96, 35,402.16 and 21,658.16 is: 29,844.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,690.96 : 35,402.16 = 21,658.16 : x
  2. Step 2: Convert to fraction form
    25,690.96/35,402.16 = 21,658.16/x
  3. Step 3: Cross multiply
    25,690.96x = 35,402.16 × 21,658.16
  4. Step 4: Simplify right side
    25,690.96x = 766,745,645.63
  5. Step 5: Solve for x
    x = 766,745,645.63/25,690.96
  6. Step 6: Final answer
    x = 29,844.96

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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.