Home / 20,366.28-28,105.47-12,408.50

Finding the Fourth Proportional to 20,366.28, 28,105.47 and 12,408.50

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Solution

The fourth proportional to 20,366.28, 28,105.47 and 12,408.50 is: 17,123.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,366.28 : 28,105.47 = 12,408.50 : x
  2. Step 2: Convert to fraction form
    20,366.28/28,105.47 = 12,408.50/x
  3. Step 3: Cross multiply
    20,366.28x = 28,105.47 × 12,408.50
  4. Step 4: Simplify right side
    20,366.28x = 348,746,794.76
  5. Step 5: Solve for x
    x = 348,746,794.76/20,366.28
  6. Step 6: Final answer
    x = 17,123.74

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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.