Home / 20,948.20-28,908.68-11,388.08

Finding the Fourth Proportional to 20,948.20, 28,908.68 and 11,388.08

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Solution

The fourth proportional to 20,948.20, 28,908.68 and 11,388.08 is: 15,715.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.20 : 28,908.68 = 11,388.08 : x
  2. Step 2: Convert to fraction form
    20,948.20/28,908.68 = 11,388.08/x
  3. Step 3: Cross multiply
    20,948.20x = 28,908.68 × 11,388.08
  4. Step 4: Simplify right side
    20,948.20x = 329,214,303.59
  5. Step 5: Solve for x
    x = 329,214,303.59/20,948.20
  6. Step 6: Final answer
    x = 15,715.64

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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.