Home / 19,120.40-28,666.62-12,864.86

Finding the Fourth Proportional to 19,120.40, 28,666.62 and 12,864.86

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Solution

The fourth proportional to 19,120.40, 28,666.62 and 12,864.86 is: 19,287.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,120.40 : 28,666.62 = 12,864.86 : x
  2. Step 2: Convert to fraction form
    19,120.40/28,666.62 = 12,864.86/x
  3. Step 3: Cross multiply
    19,120.40x = 28,666.62 × 12,864.86
  4. Step 4: Simplify right side
    19,120.40x = 368,792,052.97
  5. Step 5: Solve for x
    x = 368,792,052.97/19,120.40
  6. Step 6: Final answer
    x = 19,287.88

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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.