Home / 21,955.77-30,316.43-20,276.57

Finding the Fourth Proportional to 21,955.77, 30,316.43 and 20,276.57

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Solution

The fourth proportional to 21,955.77, 30,316.43 and 20,276.57 is: 27,997.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.77 : 30,316.43 = 20,276.57 : x
  2. Step 2: Convert to fraction form
    21,955.77/30,316.43 = 20,276.57/x
  3. Step 3: Cross multiply
    21,955.77x = 30,316.43 × 20,276.57
  4. Step 4: Simplify right side
    21,955.77x = 614,713,142.62
  5. Step 5: Solve for x
    x = 614,713,142.62/21,955.77
  6. Step 6: Final answer
    x = 27,997.79

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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.