Home / 28,720.27-39,622.71-21,184.71

Finding the Fourth Proportional to 28,720.27, 39,622.71 and 21,184.71

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Solution

The fourth proportional to 28,720.27, 39,622.71 and 21,184.71 is: 29,226.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.27 : 39,622.71 = 21,184.71 : x
  2. Step 2: Convert to fraction form
    28,720.27/39,622.71 = 21,184.71/x
  3. Step 3: Cross multiply
    28,720.27x = 39,622.71 × 21,184.71
  4. Step 4: Simplify right side
    28,720.27x = 839,395,620.76
  5. Step 5: Solve for x
    x = 839,395,620.76/28,720.27
  6. Step 6: Final answer
    x = 29,226.59

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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.