Home / 20,710.35-28,579.23-11,278.71

Finding the Fourth Proportional to 20,710.35, 28,579.23 and 11,278.71

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Solution

The fourth proportional to 20,710.35, 28,579.23 and 11,278.71 is: 15,564.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.35 : 28,579.23 = 11,278.71 : x
  2. Step 2: Convert to fraction form
    20,710.35/28,579.23 = 11,278.71/x
  3. Step 3: Cross multiply
    20,710.35x = 28,579.23 × 11,278.71
  4. Step 4: Simplify right side
    20,710.35x = 322,336,847.19
  5. Step 5: Solve for x
    x = 322,336,847.19/20,710.35
  6. Step 6: Final answer
    x = 15,564.05

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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.