Home / 20,345.70-28,073.82-11,393.58

Finding the Fourth Proportional to 20,345.70, 28,073.82 and 11,393.58

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Solution

The fourth proportional to 20,345.70, 28,073.82 and 11,393.58 is: 15,721.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.70 : 28,073.82 = 11,393.58 : x
  2. Step 2: Convert to fraction form
    20,345.70/28,073.82 = 11,393.58/x
  3. Step 3: Cross multiply
    20,345.70x = 28,073.82 × 11,393.58
  4. Step 4: Simplify right side
    20,345.70x = 319,861,314.08
  5. Step 5: Solve for x
    x = 319,861,314.08/20,345.70
  6. Step 6: Final answer
    x = 15,721.32

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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.