Home / 20,785.95-28,684.55-11,354.51

Finding the Fourth Proportional to 20,785.95, 28,684.55 and 11,354.51

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Solution

The fourth proportional to 20,785.95, 28,684.55 and 11,354.51 is: 15,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.95 : 28,684.55 = 11,354.51 : x
  2. Step 2: Convert to fraction form
    20,785.95/28,684.55 = 11,354.51/x
  3. Step 3: Cross multiply
    20,785.95x = 28,684.55 × 11,354.51
  4. Step 4: Simplify right side
    20,785.95x = 325,699,109.92
  5. Step 5: Solve for x
    x = 325,699,109.92/20,785.95
  6. Step 6: Final answer
    x = 15,669.20

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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.