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Finding the Fourth Proportional to 19,721.08, 27,215.10 and 11,337.08

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Solution

The fourth proportional to 19,721.08, 27,215.10 and 11,337.08 is: 15,645.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721.08 : 27,215.10 = 11,337.08 : x
  2. Step 2: Convert to fraction form
    19,721.08/27,215.10 = 11,337.08/x
  3. Step 3: Cross multiply
    19,721.08x = 27,215.10 × 11,337.08
  4. Step 4: Simplify right side
    19,721.08x = 308,539,765.91
  5. Step 5: Solve for x
    x = 308,539,765.91/19,721.08
  6. Step 6: Final answer
    x = 15,645.18

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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.