Home / 13,139.70-18,147.87-9,570.56

Finding the Fourth Proportional to 13,139.70, 18,147.87 and 9,570.56

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Solution

The fourth proportional to 13,139.70, 18,147.87 and 9,570.56 is: 13,218.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.70 : 18,147.87 = 9,570.56 : x
  2. Step 2: Convert to fraction form
    13,139.70/18,147.87 = 9,570.56/x
  3. Step 3: Cross multiply
    13,139.70x = 18,147.87 × 9,570.56
  4. Step 4: Simplify right side
    13,139.70x = 173,685,187.97
  5. Step 5: Solve for x
    x = 173,685,187.97/13,139.70
  6. Step 6: Final answer
    x = 13,218.35

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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.