Home / 28,154.36-38,854.20-15,579.11

Finding the Fourth Proportional to 28,154.36, 38,854.20 and 15,579.11

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Solution

The fourth proportional to 28,154.36, 38,854.20 and 15,579.11 is: 21,499.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,154.36 : 38,854.20 = 15,579.11 : x
  2. Step 2: Convert to fraction form
    28,154.36/38,854.20 = 15,579.11/x
  3. Step 3: Cross multiply
    28,154.36x = 38,854.20 × 15,579.11
  4. Step 4: Simplify right side
    28,154.36x = 605,313,661.49
  5. Step 5: Solve for x
    x = 605,313,661.49/28,154.36
  6. Step 6: Final answer
    x = 21,499.82

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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.