Home / 28,438.64-42,660.20-9,727.60

Finding the Fourth Proportional to 28,438.64, 42,660.20 and 9,727.60

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Solution

The fourth proportional to 28,438.64, 42,660.20 and 9,727.60 is: 14,592.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.64 : 42,660.20 = 9,727.60 : x
  2. Step 2: Convert to fraction form
    28,438.64/42,660.20 = 9,727.60/x
  3. Step 3: Cross multiply
    28,438.64x = 42,660.20 × 9,727.60
  4. Step 4: Simplify right side
    28,438.64x = 414,981,361.52
  5. Step 5: Solve for x
    x = 414,981,361.52/28,438.64
  6. Step 6: Final answer
    x = 14,592.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.