Home / 20,775.56-28,670.36-11,344.32

Finding the Fourth Proportional to 20,775.56, 28,670.36 and 11,344.32

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Solution

The fourth proportional to 20,775.56, 28,670.36 and 11,344.32 is: 15,655.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.56 : 28,670.36 = 11,344.32 : x
  2. Step 2: Convert to fraction form
    20,775.56/28,670.36 = 11,344.32/x
  3. Step 3: Cross multiply
    20,775.56x = 28,670.36 × 11,344.32
  4. Step 4: Simplify right side
    20,775.56x = 325,245,681.63
  5. Step 5: Solve for x
    x = 325,245,681.63/20,775.56
  6. Step 6: Final answer
    x = 15,655.21

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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.