Home / 20,345.91-28,077.99-11,393.64

Finding the Fourth Proportional to 20,345.91, 28,077.99 and 11,393.64

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Solution

The fourth proportional to 20,345.91, 28,077.99 and 11,393.64 is: 15,723.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.91 : 28,077.99 = 11,393.64 : x
  2. Step 2: Convert to fraction form
    20,345.91/28,077.99 = 11,393.64/x
  3. Step 3: Cross multiply
    20,345.91x = 28,077.99 × 11,393.64
  4. Step 4: Simplify right side
    20,345.91x = 319,910,509.98
  5. Step 5: Solve for x
    x = 319,910,509.98/20,345.91
  6. Step 6: Final answer
    x = 15,723.58

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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.