Home / 20,485.27-28,271.79-12,532.78

Finding the Fourth Proportional to 20,485.27, 28,271.79 and 12,532.78

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Solution

The fourth proportional to 20,485.27, 28,271.79 and 12,532.78 is: 17,296.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.27 : 28,271.79 = 12,532.78 : x
  2. Step 2: Convert to fraction form
    20,485.27/28,271.79 = 12,532.78/x
  3. Step 3: Cross multiply
    20,485.27x = 28,271.79 × 12,532.78
  4. Step 4: Simplify right side
    20,485.27x = 354,323,920.25
  5. Step 5: Solve for x
    x = 354,323,920.25/20,485.27
  6. Step 6: Final answer
    x = 17,296.53

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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.