Home / 20,434.07-28,217.46-12,893.78

Finding the Fourth Proportional to 20,434.07, 28,217.46 and 12,893.78

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Solution

The fourth proportional to 20,434.07, 28,217.46 and 12,893.78 is: 17,805.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434.07 : 28,217.46 = 12,893.78 : x
  2. Step 2: Convert to fraction form
    20,434.07/28,217.46 = 12,893.78/x
  3. Step 3: Cross multiply
    20,434.07x = 28,217.46 × 12,893.78
  4. Step 4: Simplify right side
    20,434.07x = 363,829,840.29
  5. Step 5: Solve for x
    x = 363,829,840.29/20,434.07
  6. Step 6: Final answer
    x = 17,805.06

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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.