Home / 20,432.49-28,196.86-11,479.99

Finding the Fourth Proportional to 20,432.49, 28,196.86 and 11,479.99

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Solution

The fourth proportional to 20,432.49, 28,196.86 and 11,479.99 is: 15,842.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.49 : 28,196.86 = 11,479.99 : x
  2. Step 2: Convert to fraction form
    20,432.49/28,196.86 = 11,479.99/x
  3. Step 3: Cross multiply
    20,432.49x = 28,196.86 × 11,479.99
  4. Step 4: Simplify right side
    20,432.49x = 323,699,529.85
  5. Step 5: Solve for x
    x = 323,699,529.85/20,432.49
  6. Step 6: Final answer
    x = 15,842.39

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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.