Home / 20,776.56-28,671.69-11,345.10

Finding the Fourth Proportional to 20,776.56, 28,671.69 and 11,345.10

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Solution

The fourth proportional to 20,776.56, 28,671.69 and 11,345.10 is: 15,656.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.56 : 28,671.69 = 11,345.10 : x
  2. Step 2: Convert to fraction form
    20,776.56/28,671.69 = 11,345.10/x
  3. Step 3: Cross multiply
    20,776.56x = 28,671.69 × 11,345.10
  4. Step 4: Simplify right side
    20,776.56x = 325,283,190.22
  5. Step 5: Solve for x
    x = 325,283,190.22/20,776.56
  6. Step 6: Final answer
    x = 15,656.26

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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.