Home / 20,965.80-28,929.51-12,011.58

Finding the Fourth Proportional to 20,965.80, 28,929.51 and 12,011.58

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Solution

The fourth proportional to 20,965.80, 28,929.51 and 12,011.58 is: 16,574.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.80 : 28,929.51 = 12,011.58 : x
  2. Step 2: Convert to fraction form
    20,965.80/28,929.51 = 12,011.58/x
  3. Step 3: Cross multiply
    20,965.80x = 28,929.51 × 12,011.58
  4. Step 4: Simplify right side
    20,965.80x = 347,489,123.73
  5. Step 5: Solve for x
    x = 347,489,123.73/20,965.80
  6. Step 6: Final answer
    x = 16,574.09

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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.