Home / 15,131.21-20,880.48-8,416.61

Finding the Fourth Proportional to 15,131.21, 20,880.48 and 8,416.61

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Solution

The fourth proportional to 15,131.21, 20,880.48 and 8,416.61 is: 11,614.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.21 : 20,880.48 = 8,416.61 : x
  2. Step 2: Convert to fraction form
    15,131.21/20,880.48 = 8,416.61/x
  3. Step 3: Cross multiply
    15,131.21x = 20,880.48 × 8,416.61
  4. Step 4: Simplify right side
    15,131.21x = 175,742,862.23
  5. Step 5: Solve for x
    x = 175,742,862.23/15,131.21
  6. Step 6: Final answer
    x = 11,614.60

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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.