Home / 15,131.36-20,881.68-8,417.66

Finding the Fourth Proportional to 15,131.36, 20,881.68 and 8,417.66

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Solution

The fourth proportional to 15,131.36, 20,881.68 and 8,417.66 is: 11,616.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.36 : 20,881.68 = 8,417.66 : x
  2. Step 2: Convert to fraction form
    15,131.36/20,881.68 = 8,417.66/x
  3. Step 3: Cross multiply
    15,131.36x = 20,881.68 × 8,417.66
  4. Step 4: Simplify right side
    15,131.36x = 175,774,882.47
  5. Step 5: Solve for x
    x = 175,774,882.47/15,131.36
  6. Step 6: Final answer
    x = 11,616.60

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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.