Home / 20,913.53-28,860.69-11,353.41

Finding the Fourth Proportional to 20,913.53, 28,860.69 and 11,353.41

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Solution

The fourth proportional to 20,913.53, 28,860.69 and 11,353.41 is: 15,667.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.53 : 28,860.69 = 11,353.41 : x
  2. Step 2: Convert to fraction form
    20,913.53/28,860.69 = 11,353.41/x
  3. Step 3: Cross multiply
    20,913.53x = 28,860.69 × 11,353.41
  4. Step 4: Simplify right side
    20,913.53x = 327,667,246.45
  5. Step 5: Solve for x
    x = 327,667,246.45/20,913.53
  6. Step 6: Final answer
    x = 15,667.72

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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.