Home / 13,711.58-18,921.90-7,745.18

Finding the Fourth Proportional to 13,711.58, 18,921.90 and 7,745.18

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Solution

The fourth proportional to 13,711.58, 18,921.90 and 7,745.18 is: 10,688.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.58 : 18,921.90 = 7,745.18 : x
  2. Step 2: Convert to fraction form
    13,711.58/18,921.90 = 7,745.18/x
  3. Step 3: Cross multiply
    13,711.58x = 18,921.90 × 7,745.18
  4. Step 4: Simplify right side
    13,711.58x = 146,553,521.44
  5. Step 5: Solve for x
    x = 146,553,521.44/13,711.58
  6. Step 6: Final answer
    x = 10,688.30

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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.