Home / 20,508.50-28,303.98-11,558.18

Finding the Fourth Proportional to 20,508.50, 28,303.98 and 11,558.18

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Solution

The fourth proportional to 20,508.50, 28,303.98 and 11,558.18 is: 15,951.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,508.50 : 28,303.98 = 11,558.18 : x
  2. Step 2: Convert to fraction form
    20,508.50/28,303.98 = 11,558.18/x
  3. Step 3: Cross multiply
    20,508.50x = 28,303.98 × 11,558.18
  4. Step 4: Simplify right side
    20,508.50x = 327,142,495.56
  5. Step 5: Solve for x
    x = 327,142,495.56/20,508.50
  6. Step 6: Final answer
    x = 15,951.56

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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.