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Finding the Fourth Proportional to 13,580.88, 18,741.69 and 7,612.80

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Solution

The fourth proportional to 13,580.88, 18,741.69 and 7,612.80 is: 10,505.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,580.88 : 18,741.69 = 7,612.80 : x
  2. Step 2: Convert to fraction form
    13,580.88/18,741.69 = 7,612.80/x
  3. Step 3: Cross multiply
    13,580.88x = 18,741.69 × 7,612.80
  4. Step 4: Simplify right side
    13,580.88x = 142,676,737.63
  5. Step 5: Solve for x
    x = 142,676,737.63/13,580.88
  6. Step 6: Final answer
    x = 10,505.71

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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.