Home / 20,926.15-28,865.30-12,422.50

Finding the Fourth Proportional to 20,926.15, 28,865.30 and 12,422.50

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Solution

The fourth proportional to 20,926.15, 28,865.30 and 12,422.50 is: 17,135.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.15 : 28,865.30 = 12,422.50 : x
  2. Step 2: Convert to fraction form
    20,926.15/28,865.30 = 12,422.50/x
  3. Step 3: Cross multiply
    20,926.15x = 28,865.30 × 12,422.50
  4. Step 4: Simplify right side
    20,926.15x = 358,579,054.97
  5. Step 5: Solve for x
    x = 358,579,054.97/20,926.15
  6. Step 6: Final answer
    x = 17,135.45

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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.