Home / 20,829.96-28,746.06-11,398.50

Finding the Fourth Proportional to 20,829.96, 28,746.06 and 11,398.50

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Solution

The fourth proportional to 20,829.96, 28,746.06 and 11,398.50 is: 15,730.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.96 : 28,746.06 = 11,398.50 : x
  2. Step 2: Convert to fraction form
    20,829.96/28,746.06 = 11,398.50/x
  3. Step 3: Cross multiply
    20,829.96x = 28,746.06 × 11,398.50
  4. Step 4: Simplify right side
    20,829.96x = 327,661,964.91
  5. Step 5: Solve for x
    x = 327,661,964.91/20,829.96
  6. Step 6: Final answer
    x = 15,730.32

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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.