Home / 20,785.85-28,684.47-11,225.74

Finding the Fourth Proportional to 20,785.85, 28,684.47 and 11,225.74

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Solution

The fourth proportional to 20,785.85, 28,684.47 and 11,225.74 is: 15,491.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.85 : 28,684.47 = 11,225.74 : x
  2. Step 2: Convert to fraction form
    20,785.85/28,684.47 = 11,225.74/x
  3. Step 3: Cross multiply
    20,785.85x = 28,684.47 × 11,225.74
  4. Step 4: Simplify right side
    20,785.85x = 322,004,335.66
  5. Step 5: Solve for x
    x = 322,004,335.66/20,785.85
  6. Step 6: Final answer
    x = 15,491.52

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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.