Home / 13,555.02-18,711.83-9,729.39

Finding the Fourth Proportional to 13,555.02, 18,711.83 and 9,729.39

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Solution

The fourth proportional to 13,555.02, 18,711.83 and 9,729.39 is: 13,430.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,555.02 : 18,711.83 = 9,729.39 : x
  2. Step 2: Convert to fraction form
    13,555.02/18,711.83 = 9,729.39/x
  3. Step 3: Cross multiply
    13,555.02x = 18,711.83 × 9,729.39
  4. Step 4: Simplify right side
    13,555.02x = 182,054,691.68
  5. Step 5: Solve for x
    x = 182,054,691.68/13,555.02
  6. Step 6: Final answer
    x = 13,430.79

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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.