Home / 20,821.64-28,730.52-12,866.48

Finding the Fourth Proportional to 20,821.64, 28,730.52 and 12,866.48

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Solution

The fourth proportional to 20,821.64, 28,730.52 and 12,866.48 is: 17,753.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.64 : 28,730.52 = 12,866.48 : x
  2. Step 2: Convert to fraction form
    20,821.64/28,730.52 = 12,866.48/x
  3. Step 3: Cross multiply
    20,821.64x = 28,730.52 × 12,866.48
  4. Step 4: Simplify right side
    20,821.64x = 369,660,660.97
  5. Step 5: Solve for x
    x = 369,660,660.97/20,821.64
  6. Step 6: Final answer
    x = 17,753.68

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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.