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Finding the Fourth Proportional to 19,674.70, 27,150.19 and 10,721.90

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Solution

The fourth proportional to 19,674.70, 27,150.19 and 10,721.90 is: 14,795.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,674.70 : 27,150.19 = 10,721.90 : x
  2. Step 2: Convert to fraction form
    19,674.70/27,150.19 = 10,721.90/x
  3. Step 3: Cross multiply
    19,674.70x = 27,150.19 × 10,721.90
  4. Step 4: Simplify right side
    19,674.70x = 291,101,663.23
  5. Step 5: Solve for x
    x = 291,101,663.23/19,674.70
  6. Step 6: Final answer
    x = 14,795.74

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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.