Home / 13,427.75-18,528.23-7,761.40

Finding the Fourth Proportional to 13,427.75, 18,528.23 and 7,761.40

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Solution

The fourth proportional to 13,427.75, 18,528.23 and 7,761.40 is: 10,709.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,427.75 : 18,528.23 = 7,761.40 : x
  2. Step 2: Convert to fraction form
    13,427.75/18,528.23 = 7,761.40/x
  3. Step 3: Cross multiply
    13,427.75x = 18,528.23 × 7,761.40
  4. Step 4: Simplify right side
    13,427.75x = 143,805,004.32
  5. Step 5: Solve for x
    x = 143,805,004.32/13,427.75
  6. Step 6: Final answer
    x = 10,709.54

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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.