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Finding the Fourth Proportional to 19,703.52, 27,191.90 and 11,320.56

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Solution

The fourth proportional to 19,703.52, 27,191.90 and 11,320.56 is: 15,622.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,703.52 : 27,191.90 = 11,320.56 : x
  2. Step 2: Convert to fraction form
    19,703.52/27,191.90 = 11,320.56/x
  3. Step 3: Cross multiply
    19,703.52x = 27,191.90 × 11,320.56
  4. Step 4: Simplify right side
    19,703.52x = 307,827,535.46
  5. Step 5: Solve for x
    x = 307,827,535.46/19,703.52
  6. Step 6: Final answer
    x = 15,622.97

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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.