Home / 13,439.04-20,117.28-12,171.84

Finding the Fourth Proportional to 13,439.04, 20,117.28 and 12,171.84

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Solution

The fourth proportional to 13,439.04, 20,117.28 and 12,171.84 is: 18,220.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.04 : 20,117.28 = 12,171.84 : x
  2. Step 2: Convert to fraction form
    13,439.04/20,117.28 = 12,171.84/x
  3. Step 3: Cross multiply
    13,439.04x = 20,117.28 × 12,171.84
  4. Step 4: Simplify right side
    13,439.04x = 244,864,313.40
  5. Step 5: Solve for x
    x = 244,864,313.40/13,439.04
  6. Step 6: Final answer
    x = 18,220.37

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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.