Home / 20,720.24-28,592.88-12,222.08

Finding the Fourth Proportional to 20,720.24, 28,592.88 and 12,222.08

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Solution

The fourth proportional to 20,720.24, 28,592.88 and 12,222.08 is: 16,865.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.24 : 28,592.88 = 12,222.08 : x
  2. Step 2: Convert to fraction form
    20,720.24/28,592.88 = 12,222.08/x
  3. Step 3: Cross multiply
    20,720.24x = 28,592.88 × 12,222.08
  4. Step 4: Simplify right side
    20,720.24x = 349,464,466.79
  5. Step 5: Solve for x
    x = 349,464,466.79/20,720.24
  6. Step 6: Final answer
    x = 16,865.85

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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.