Home / 13,667.28-20,459.58-9,720.14

Finding the Fourth Proportional to 13,667.28, 20,459.58 and 9,720.14

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Solution

The fourth proportional to 13,667.28, 20,459.58 and 9,720.14 is: 14,550.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,667.28 : 20,459.58 = 9,720.14 : x
  2. Step 2: Convert to fraction form
    13,667.28/20,459.58 = 9,720.14/x
  3. Step 3: Cross multiply
    13,667.28x = 20,459.58 × 9,720.14
  4. Step 4: Simplify right side
    13,667.28x = 198,869,981.94
  5. Step 5: Solve for x
    x = 198,869,981.94/13,667.28
  6. Step 6: Final answer
    x = 14,550.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.