Home / 20,079.55-27,709.95-11,127.21

Finding the Fourth Proportional to 20,079.55, 27,709.95 and 11,127.21

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Solution

The fourth proportional to 20,079.55, 27,709.95 and 11,127.21 is: 15,355.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.55 : 27,709.95 = 11,127.21 : x
  2. Step 2: Convert to fraction form
    20,079.55/27,709.95 = 11,127.21/x
  3. Step 3: Cross multiply
    20,079.55x = 27,709.95 × 11,127.21
  4. Step 4: Simplify right side
    20,079.55x = 308,334,238.55
  5. Step 5: Solve for x
    x = 308,334,238.55/20,079.55
  6. Step 6: Final answer
    x = 15,355.63

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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.