Home / 20,776.57-28,671.75-11,345.13

Finding the Fourth Proportional to 20,776.57, 28,671.75 and 11,345.13

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Solution

The fourth proportional to 20,776.57, 28,671.75 and 11,345.13 is: 15,656.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.57 : 28,671.75 = 11,345.13 : x
  2. Step 2: Convert to fraction form
    20,776.57/28,671.75 = 11,345.13/x
  3. Step 3: Cross multiply
    20,776.57x = 28,671.75 × 11,345.13
  4. Step 4: Simplify right side
    20,776.57x = 325,284,731.08
  5. Step 5: Solve for x
    x = 325,284,731.08/20,776.57
  6. Step 6: Final answer
    x = 15,656.33

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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.