Home / 20,807.99-28,712.78-12,310.43

Finding the Fourth Proportional to 20,807.99, 28,712.78 and 12,310.43

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Solution

The fourth proportional to 20,807.99, 28,712.78 and 12,310.43 is: 16,987.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.99 : 28,712.78 = 12,310.43 : x
  2. Step 2: Convert to fraction form
    20,807.99/28,712.78 = 12,310.43/x
  3. Step 3: Cross multiply
    20,807.99x = 28,712.78 × 12,310.43
  4. Step 4: Simplify right side
    20,807.99x = 353,466,606.74
  5. Step 5: Solve for x
    x = 353,466,606.74/20,807.99
  6. Step 6: Final answer
    x = 16,987.06

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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.