Home / 20,925.83-28,882.62-11,978.50

Finding the Fourth Proportional to 20,925.83, 28,882.62 and 11,978.50

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Solution

The fourth proportional to 20,925.83, 28,882.62 and 11,978.50 is: 16,533.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.83 : 28,882.62 = 11,978.50 : x
  2. Step 2: Convert to fraction form
    20,925.83/28,882.62 = 11,978.50/x
  3. Step 3: Cross multiply
    20,925.83x = 28,882.62 × 11,978.50
  4. Step 4: Simplify right side
    20,925.83x = 345,970,463.67
  5. Step 5: Solve for x
    x = 345,970,463.67/20,925.83
  6. Step 6: Final answer
    x = 16,533.18

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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.