Home / 20,963.80-28,929.54-12,011.32

Finding the Fourth Proportional to 20,963.80, 28,929.54 and 12,011.32

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Solution

The fourth proportional to 20,963.80, 28,929.54 and 12,011.32 is: 16,575.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.80 : 28,929.54 = 12,011.32 : x
  2. Step 2: Convert to fraction form
    20,963.80/28,929.54 = 12,011.32/x
  3. Step 3: Cross multiply
    20,963.80x = 28,929.54 × 12,011.32
  4. Step 4: Simplify right side
    20,963.80x = 347,481,962.39
  5. Step 5: Solve for x
    x = 347,481,962.39/20,963.80
  6. Step 6: Final answer
    x = 16,575.33

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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.