Home / 28,441.88-42,670.12-8,720.60

Finding the Fourth Proportional to 28,441.88, 42,670.12 and 8,720.60

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Solution

The fourth proportional to 28,441.88, 42,670.12 and 8,720.60 is: 13,083.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,441.88 : 42,670.12 = 8,720.60 : x
  2. Step 2: Convert to fraction form
    28,441.88/42,670.12 = 8,720.60/x
  3. Step 3: Cross multiply
    28,441.88x = 42,670.12 × 8,720.60
  4. Step 4: Simplify right side
    28,441.88x = 372,109,048.47
  5. Step 5: Solve for x
    x = 372,109,048.47/28,441.88
  6. Step 6: Final answer
    x = 13,083.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.