Home / 15,390.25-21,238.55-8,766.25

Finding the Fourth Proportional to 15,390.25, 21,238.55 and 8,766.25

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Solution

The fourth proportional to 15,390.25, 21,238.55 and 8,766.25 is: 12,097.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.25 : 21,238.55 = 8,766.25 : x
  2. Step 2: Convert to fraction form
    15,390.25/21,238.55 = 8,766.25/x
  3. Step 3: Cross multiply
    15,390.25x = 21,238.55 × 8,766.25
  4. Step 4: Simplify right side
    15,390.25x = 186,182,438.94
  5. Step 5: Solve for x
    x = 186,182,438.94/15,390.25
  6. Step 6: Final answer
    x = 12,097.43

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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.