Home / 20,485.60-28,268.40-11,532.40

Finding the Fourth Proportional to 20,485.60, 28,268.40 and 11,532.40

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Solution

The fourth proportional to 20,485.60, 28,268.40 and 11,532.40 is: 15,913.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.60 : 28,268.40 = 11,532.40 : x
  2. Step 2: Convert to fraction form
    20,485.60/28,268.40 = 11,532.40/x
  3. Step 3: Cross multiply
    20,485.60x = 28,268.40 × 11,532.40
  4. Step 4: Simplify right side
    20,485.60x = 326,002,496.16
  5. Step 5: Solve for x
    x = 326,002,496.16/20,485.60
  6. Step 6: Final answer
    x = 15,913.74

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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.