Home / 20,721.72-28,596.43-12,225.91

Finding the Fourth Proportional to 20,721.72, 28,596.43 and 12,225.91

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Solution

The fourth proportional to 20,721.72, 28,596.43 and 12,225.91 is: 16,872.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.72 : 28,596.43 = 12,225.91 : x
  2. Step 2: Convert to fraction form
    20,721.72/28,596.43 = 12,225.91/x
  3. Step 3: Cross multiply
    20,721.72x = 28,596.43 × 12,225.91
  4. Step 4: Simplify right side
    20,721.72x = 349,617,440.15
  5. Step 5: Solve for x
    x = 349,617,440.15/20,721.72
  6. Step 6: Final answer
    x = 16,872.02

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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.