Home / 13,747.28-18,973.98-7,778.96

Finding the Fourth Proportional to 13,747.28, 18,973.98 and 7,778.96

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Solution

The fourth proportional to 13,747.28, 18,973.98 and 7,778.96 is: 10,736.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.28 : 18,973.98 = 7,778.96 : x
  2. Step 2: Convert to fraction form
    13,747.28/18,973.98 = 7,778.96/x
  3. Step 3: Cross multiply
    13,747.28x = 18,973.98 × 7,778.96
  4. Step 4: Simplify right side
    13,747.28x = 147,597,831.46
  5. Step 5: Solve for x
    x = 147,597,831.46/13,747.28
  6. Step 6: Final answer
    x = 10,736.51

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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.