Home / 20,793.19-28,686.46-12,821.58

Finding the Fourth Proportional to 20,793.19, 28,686.46 and 12,821.58

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Solution

The fourth proportional to 20,793.19, 28,686.46 and 12,821.58 is: 17,688.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.19 : 28,686.46 = 12,821.58 : x
  2. Step 2: Convert to fraction form
    20,793.19/28,686.46 = 12,821.58/x
  3. Step 3: Cross multiply
    20,793.19x = 28,686.46 × 12,821.58
  4. Step 4: Simplify right side
    20,793.19x = 367,805,741.81
  5. Step 5: Solve for x
    x = 367,805,741.81/20,793.19
  6. Step 6: Final answer
    x = 17,688.76

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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.