Home / 20,445.72-28,216.94-11,495.40

Finding the Fourth Proportional to 20,445.72, 28,216.94 and 11,495.40

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Solution

The fourth proportional to 20,445.72, 28,216.94 and 11,495.40 is: 15,864.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.72 : 28,216.94 = 11,495.40 : x
  2. Step 2: Convert to fraction form
    20,445.72/28,216.94 = 11,495.40/x
  3. Step 3: Cross multiply
    20,445.72x = 28,216.94 × 11,495.40
  4. Step 4: Simplify right side
    20,445.72x = 324,365,012.08
  5. Step 5: Solve for x
    x = 324,365,012.08/20,445.72
  6. Step 6: Final answer
    x = 15,864.69

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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.