Home / 20,334.65-28,053.54-12,778.56

Finding the Fourth Proportional to 20,334.65, 28,053.54 and 12,778.56

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Solution

The fourth proportional to 20,334.65, 28,053.54 and 12,778.56 is: 17,629.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,334.65 : 28,053.54 = 12,778.56 : x
  2. Step 2: Convert to fraction form
    20,334.65/28,053.54 = 12,778.56/x
  3. Step 3: Cross multiply
    20,334.65x = 28,053.54 × 12,778.56
  4. Step 4: Simplify right side
    20,334.65x = 358,483,844.10
  5. Step 5: Solve for x
    x = 358,483,844.10/20,334.65
  6. Step 6: Final answer
    x = 17,629.22

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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.