Home / 20,470.64-28,239.96-12,913.52

Finding the Fourth Proportional to 20,470.64, 28,239.96 and 12,913.52

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Solution

The fourth proportional to 20,470.64, 28,239.96 and 12,913.52 is: 17,814.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.64 : 28,239.96 = 12,913.52 : x
  2. Step 2: Convert to fraction form
    20,470.64/28,239.96 = 12,913.52/x
  3. Step 3: Cross multiply
    20,470.64x = 28,239.96 × 12,913.52
  4. Step 4: Simplify right side
    20,470.64x = 364,677,288.26
  5. Step 5: Solve for x
    x = 364,677,288.26/20,470.64
  6. Step 6: Final answer
    x = 17,814.65

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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.