Home / 20,978.60-28,960.08-14,932.76

Finding the Fourth Proportional to 20,978.60, 28,960.08 and 14,932.76

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Solution

The fourth proportional to 20,978.60, 28,960.08 and 14,932.76 is: 20,614.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,978.60 : 28,960.08 = 14,932.76 : x
  2. Step 2: Convert to fraction form
    20,978.60/28,960.08 = 14,932.76/x
  3. Step 3: Cross multiply
    20,978.60x = 28,960.08 × 14,932.76
  4. Step 4: Simplify right side
    20,978.60x = 432,453,924.22
  5. Step 5: Solve for x
    x = 432,453,924.22/20,978.60
  6. Step 6: Final answer
    x = 20,614.05

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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.