Home / 20,673.36-28,520.10-12,285

Finding the Fourth Proportional to 20,673.36, 28,520.10 and 12,285

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Solution

The fourth proportional to 20,673.36, 28,520.10 and 12,285 is: 16,947.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.36 : 28,520.10 = 12,285 : x
  2. Step 2: Convert to fraction form
    20,673.36/28,520.10 = 12,285/x
  3. Step 3: Cross multiply
    20,673.36x = 28,520.10 × 12,285
  4. Step 4: Simplify right side
    20,673.36x = 350,369,428.50
  5. Step 5: Solve for x
    x = 350,369,428.50/20,673.36
  6. Step 6: Final answer
    x = 16,947.87

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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.