Home / 21,949.68-30,290.64-20,275.36

Finding the Fourth Proportional to 21,949.68, 30,290.64 and 20,275.36

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Solution

The fourth proportional to 21,949.68, 30,290.64 and 20,275.36 is: 27,980.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,949.68 : 30,290.64 = 20,275.36 : x
  2. Step 2: Convert to fraction form
    21,949.68/30,290.64 = 20,275.36/x
  3. Step 3: Cross multiply
    21,949.68x = 30,290.64 × 20,275.36
  4. Step 4: Simplify right side
    21,949.68x = 614,153,630.63
  5. Step 5: Solve for x
    x = 614,153,630.63/21,949.68
  6. Step 6: Final answer
    x = 27,980.07

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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.