Home / 20,206.08-27,887.12-12,775.68

Finding the Fourth Proportional to 20,206.08, 27,887.12 and 12,775.68

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Solution

The fourth proportional to 20,206.08, 27,887.12 and 12,775.68 is: 17,632.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,206.08 : 27,887.12 = 12,775.68 : x
  2. Step 2: Convert to fraction form
    20,206.08/27,887.12 = 12,775.68/x
  3. Step 3: Cross multiply
    20,206.08x = 27,887.12 × 12,775.68
  4. Step 4: Simplify right side
    20,206.08x = 356,276,921.24
  5. Step 5: Solve for x
    x = 356,276,921.24/20,206.08
  6. Step 6: Final answer
    x = 17,632.16

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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.