Home / 20,583.87-28,415.55-13,789.59

Finding the Fourth Proportional to 20,583.87, 28,415.55 and 13,789.59

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Solution

The fourth proportional to 20,583.87, 28,415.55 and 13,789.59 is: 19,036.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,583.87 : 28,415.55 = 13,789.59 : x
  2. Step 2: Convert to fraction form
    20,583.87/28,415.55 = 13,789.59/x
  3. Step 3: Cross multiply
    20,583.87x = 28,415.55 × 13,789.59
  4. Step 4: Simplify right side
    20,583.87x = 391,838,784.12
  5. Step 5: Solve for x
    x = 391,838,784.12/20,583.87
  6. Step 6: Final answer
    x = 19,036.21

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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.