Home / 19,991.10-27,587.64-10,917.06

Finding the Fourth Proportional to 19,991.10, 27,587.64 and 10,917.06

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Solution

The fourth proportional to 19,991.10, 27,587.64 and 10,917.06 is: 15,065.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.10 : 27,587.64 = 10,917.06 : x
  2. Step 2: Convert to fraction form
    19,991.10/27,587.64 = 10,917.06/x
  3. Step 3: Cross multiply
    19,991.10x = 27,587.64 × 10,917.06
  4. Step 4: Simplify right side
    19,991.10x = 301,175,921.14
  5. Step 5: Solve for x
    x = 301,175,921.14/19,991.10
  6. Step 6: Final answer
    x = 15,065.50

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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.