Home / 20,488.96-28,269.73-12,528.28

Finding the Fourth Proportional to 20,488.96, 28,269.73 and 12,528.28

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Solution

The fourth proportional to 20,488.96, 28,269.73 and 12,528.28 is: 17,285.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.96 : 28,269.73 = 12,528.28 : x
  2. Step 2: Convert to fraction form
    20,488.96/28,269.73 = 12,528.28/x
  3. Step 3: Cross multiply
    20,488.96x = 28,269.73 × 12,528.28
  4. Step 4: Simplify right side
    20,488.96x = 354,170,990.97
  5. Step 5: Solve for x
    x = 354,170,990.97/20,488.96
  6. Step 6: Final answer
    x = 17,285.94

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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.