Home / 20,518.92-28,318.23-12,566.40

Finding the Fourth Proportional to 20,518.92, 28,318.23 and 12,566.40

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Solution

The fourth proportional to 20,518.92, 28,318.23 and 12,566.40 is: 17,342.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.92 : 28,318.23 = 12,566.40 : x
  2. Step 2: Convert to fraction form
    20,518.92/28,318.23 = 12,566.40/x
  3. Step 3: Cross multiply
    20,518.92x = 28,318.23 × 12,566.40
  4. Step 4: Simplify right side
    20,518.92x = 355,858,205.47
  5. Step 5: Solve for x
    x = 355,858,205.47/20,518.92
  6. Step 6: Final answer
    x = 17,342.93

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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.