Home / 15,153.03-20,911.13-8,438.74

Finding the Fourth Proportional to 15,153.03, 20,911.13 and 8,438.74

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Solution

The fourth proportional to 15,153.03, 20,911.13 and 8,438.74 is: 11,645.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.03 : 20,911.13 = 8,438.74 : x
  2. Step 2: Convert to fraction form
    15,153.03/20,911.13 = 8,438.74/x
  3. Step 3: Cross multiply
    15,153.03x = 20,911.13 × 8,438.74
  4. Step 4: Simplify right side
    15,153.03x = 176,463,526.35
  5. Step 5: Solve for x
    x = 176,463,526.35/15,153.03
  6. Step 6: Final answer
    x = 11,645.43

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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.