Home / 13,418.86-18,505.27-9,781.60

Finding the Fourth Proportional to 13,418.86, 18,505.27 and 9,781.60

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Solution

The fourth proportional to 13,418.86, 18,505.27 and 9,781.60 is: 13,489.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.86 : 18,505.27 = 9,781.60 : x
  2. Step 2: Convert to fraction form
    13,418.86/18,505.27 = 9,781.60/x
  3. Step 3: Cross multiply
    13,418.86x = 18,505.27 × 9,781.60
  4. Step 4: Simplify right side
    13,418.86x = 181,011,124.58
  5. Step 5: Solve for x
    x = 181,011,124.58/13,418.86
  6. Step 6: Final answer
    x = 13,489.31

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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.