Home / 20,983.48-28,959.29-15,669.07

Finding the Fourth Proportional to 20,983.48, 28,959.29 and 15,669.07

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Solution

The fourth proportional to 20,983.48, 28,959.29 and 15,669.07 is: 21,624.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.48 : 28,959.29 = 15,669.07 : x
  2. Step 2: Convert to fraction form
    20,983.48/28,959.29 = 15,669.07/x
  3. Step 3: Cross multiply
    20,983.48x = 28,959.29 × 15,669.07
  4. Step 4: Simplify right side
    20,983.48x = 453,765,145.13
  5. Step 5: Solve for x
    x = 453,765,145.13/20,983.48
  6. Step 6: Final answer
    x = 21,624.88

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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.