Home / 20,642.63-28,487.43-11,211.80

Finding the Fourth Proportional to 20,642.63, 28,487.43 and 11,211.80

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Solution

The fourth proportional to 20,642.63, 28,487.43 and 11,211.80 is: 15,472.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.63 : 28,487.43 = 11,211.80 : x
  2. Step 2: Convert to fraction form
    20,642.63/28,487.43 = 11,211.80/x
  3. Step 3: Cross multiply
    20,642.63x = 28,487.43 × 11,211.80
  4. Step 4: Simplify right side
    20,642.63x = 319,395,225.24
  5. Step 5: Solve for x
    x = 319,395,225.24/20,642.63
  6. Step 6: Final answer
    x = 15,472.61

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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.