Home / 15,351.21-21,184.47-8,636.85

Finding the Fourth Proportional to 15,351.21, 21,184.47 and 8,636.85

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Solution

The fourth proportional to 15,351.21, 21,184.47 and 8,636.85 is: 11,918.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,351.21 : 21,184.47 = 8,636.85 : x
  2. Step 2: Convert to fraction form
    15,351.21/21,184.47 = 8,636.85/x
  3. Step 3: Cross multiply
    15,351.21x = 21,184.47 × 8,636.85
  4. Step 4: Simplify right side
    15,351.21x = 182,967,089.72
  5. Step 5: Solve for x
    x = 182,967,089.72/15,351.21
  6. Step 6: Final answer
    x = 11,918.74

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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.