Home / 20,721.42-28,587-14,437.44

Finding the Fourth Proportional to 20,721.42, 28,587 and 14,437.44

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Solution

The fourth proportional to 20,721.42, 28,587 and 14,437.44 is: 19,917.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.42 : 28,587 = 14,437.44 : x
  2. Step 2: Convert to fraction form
    20,721.42/28,587 = 14,437.44/x
  3. Step 3: Cross multiply
    20,721.42x = 28,587 × 14,437.44
  4. Step 4: Simplify right side
    20,721.42x = 412,723,097.28
  5. Step 5: Solve for x
    x = 412,723,097.28/20,721.42
  6. Step 6: Final answer
    x = 19,917.70

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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.