Home / 19,781.78-27,299.63-11,285.29

Finding the Fourth Proportional to 19,781.78, 27,299.63 and 11,285.29

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Solution

The fourth proportional to 19,781.78, 27,299.63 and 11,285.29 is: 15,574.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,781.78 : 27,299.63 = 11,285.29 : x
  2. Step 2: Convert to fraction form
    19,781.78/27,299.63 = 11,285.29/x
  3. Step 3: Cross multiply
    19,781.78x = 27,299.63 × 11,285.29
  4. Step 4: Simplify right side
    19,781.78x = 308,084,116.77
  5. Step 5: Solve for x
    x = 308,084,116.77/19,781.78
  6. Step 6: Final answer
    x = 15,574.13

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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.