Home / 20,135.06-27,785.95-11,182.40

Finding the Fourth Proportional to 20,135.06, 27,785.95 and 11,182.40

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Solution

The fourth proportional to 20,135.06, 27,785.95 and 11,182.40 is: 15,431.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.06 : 27,785.95 = 11,182.40 : x
  2. Step 2: Convert to fraction form
    20,135.06/27,785.95 = 11,182.40/x
  3. Step 3: Cross multiply
    20,135.06x = 27,785.95 × 11,182.40
  4. Step 4: Simplify right side
    20,135.06x = 310,713,440.39
  5. Step 5: Solve for x
    x = 310,713,440.39/20,135.06
  6. Step 6: Final answer
    x = 15,431.47

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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.