Home / 12,505.55-18,720.90-7,560.23

Finding the Fourth Proportional to 12,505.55, 18,720.90 and 7,560.23

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Solution

The fourth proportional to 12,505.55, 18,720.90 and 7,560.23 is: 11,317.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.55 : 18,720.90 = 7,560.23 : x
  2. Step 2: Convert to fraction form
    12,505.55/18,720.90 = 7,560.23/x
  3. Step 3: Cross multiply
    12,505.55x = 18,720.90 × 7,560.23
  4. Step 4: Simplify right side
    12,505.55x = 141,534,216.20
  5. Step 5: Solve for x
    x = 141,534,216.20/12,505.55
  6. Step 6: Final answer
    x = 11,317.72

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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.