Home / 20,929.20-28,881.96-11,497.68

Finding the Fourth Proportional to 20,929.20, 28,881.96 and 11,497.68

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Solution

The fourth proportional to 20,929.20, 28,881.96 and 11,497.68 is: 15,866.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.20 : 28,881.96 = 11,497.68 : x
  2. Step 2: Convert to fraction form
    20,929.20/28,881.96 = 11,497.68/x
  3. Step 3: Cross multiply
    20,929.20x = 28,881.96 × 11,497.68
  4. Step 4: Simplify right side
    20,929.20x = 332,075,533.85
  5. Step 5: Solve for x
    x = 332,075,533.85/20,929.20
  6. Step 6: Final answer
    x = 15,866.61

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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.