Home / 20,926.56-28,866.59-12,538.20

Finding the Fourth Proportional to 20,926.56, 28,866.59 and 12,538.20

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Solution

The fourth proportional to 20,926.56, 28,866.59 and 12,538.20 is: 17,295.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.56 : 28,866.59 = 12,538.20 : x
  2. Step 2: Convert to fraction form
    20,926.56/28,866.59 = 12,538.20/x
  3. Step 3: Cross multiply
    20,926.56x = 28,866.59 × 12,538.20
  4. Step 4: Simplify right side
    20,926.56x = 361,935,078.74
  5. Step 5: Solve for x
    x = 361,935,078.74/20,926.56
  6. Step 6: Final answer
    x = 17,295.49

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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.