Home / 20,429.49-28,188.30-11,927.74

Finding the Fourth Proportional to 20,429.49, 28,188.30 and 11,927.74

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Solution

The fourth proportional to 20,429.49, 28,188.30 and 11,927.74 is: 16,457.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.49 : 28,188.30 = 11,927.74 : x
  2. Step 2: Convert to fraction form
    20,429.49/28,188.30 = 11,927.74/x
  3. Step 3: Cross multiply
    20,429.49x = 28,188.30 × 11,927.74
  4. Step 4: Simplify right side
    20,429.49x = 336,222,713.44
  5. Step 5: Solve for x
    x = 336,222,713.44/20,429.49
  6. Step 6: Final answer
    x = 16,457.72

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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.