Home / 21,869.51-30,147.62-15,476.22

Finding the Fourth Proportional to 21,869.51, 30,147.62 and 15,476.22

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Solution

The fourth proportional to 21,869.51, 30,147.62 and 15,476.22 is: 21,334.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,869.51 : 30,147.62 = 15,476.22 : x
  2. Step 2: Convert to fraction form
    21,869.51/30,147.62 = 15,476.22/x
  3. Step 3: Cross multiply
    21,869.51x = 30,147.62 × 15,476.22
  4. Step 4: Simplify right side
    21,869.51x = 466,571,122.22
  5. Step 5: Solve for x
    x = 466,571,122.22/21,869.51
  6. Step 6: Final answer
    x = 21,334.32

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Half scale
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Double scale
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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.