Home / 20,728.64-28,597.92-13,280.96

Finding the Fourth Proportional to 20,728.64, 28,597.92 and 13,280.96

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Solution

The fourth proportional to 20,728.64, 28,597.92 and 13,280.96 is: 18,322.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.64 : 28,597.92 = 13,280.96 : x
  2. Step 2: Convert to fraction form
    20,728.64/28,597.92 = 13,280.96/x
  3. Step 3: Cross multiply
    20,728.64x = 28,597.92 × 13,280.96
  4. Step 4: Simplify right side
    20,728.64x = 379,807,831.60
  5. Step 5: Solve for x
    x = 379,807,831.60/20,728.64
  6. Step 6: Final answer
    x = 18,322.85

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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.