Home / 18,390.06-27,585.09-12,854.21

Finding the Fourth Proportional to 18,390.06, 27,585.09 and 12,854.21

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Solution

The fourth proportional to 18,390.06, 27,585.09 and 12,854.21 is: 19,281.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.06 : 27,585.09 = 12,854.21 : x
  2. Step 2: Convert to fraction form
    18,390.06/27,585.09 = 12,854.21/x
  3. Step 3: Cross multiply
    18,390.06x = 27,585.09 × 12,854.21
  4. Step 4: Simplify right side
    18,390.06x = 354,584,539.73
  5. Step 5: Solve for x
    x = 354,584,539.73/18,390.06
  6. Step 6: Final answer
    x = 19,281.32

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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.