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Finding the Fourth Proportional to 19,673.65, 27,149.64 and 10,721.13

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Solution

The fourth proportional to 19,673.65, 27,149.64 and 10,721.13 is: 14,795.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,673.65 : 27,149.64 = 10,721.13 : x
  2. Step 2: Convert to fraction form
    19,673.65/27,149.64 = 10,721.13/x
  3. Step 3: Cross multiply
    19,673.65x = 27,149.64 × 10,721.13
  4. Step 4: Simplify right side
    19,673.65x = 291,074,819.89
  5. Step 5: Solve for x
    x = 291,074,819.89/19,673.65
  6. Step 6: Final answer
    x = 14,795.16

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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.