Home / 20,579.08-28,398.88-12,079.70

Finding the Fourth Proportional to 20,579.08, 28,398.88 and 12,079.70

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Solution

The fourth proportional to 20,579.08, 28,398.88 and 12,079.70 is: 16,669.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.08 : 28,398.88 = 12,079.70 : x
  2. Step 2: Convert to fraction form
    20,579.08/28,398.88 = 12,079.70/x
  3. Step 3: Cross multiply
    20,579.08x = 28,398.88 × 12,079.70
  4. Step 4: Simplify right side
    20,579.08x = 343,049,950.74
  5. Step 5: Solve for x
    x = 343,049,950.74/20,579.08
  6. Step 6: Final answer
    x = 16,669.84

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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.