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Finding the Fourth Proportional to 21,202.56, 29,259.84 and 12,370.56

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Solution

The fourth proportional to 21,202.56, 29,259.84 and 12,370.56 is: 17,071.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,202.56 : 29,259.84 = 12,370.56 : x
  2. Step 2: Convert to fraction form
    21,202.56/29,259.84 = 12,370.56/x
  3. Step 3: Cross multiply
    21,202.56x = 29,259.84 × 12,370.56
  4. Step 4: Simplify right side
    21,202.56x = 361,960,606.31
  5. Step 5: Solve for x
    x = 361,960,606.31/21,202.56
  6. Step 6: Final answer
    x = 17,071.55

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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.