Home / 13,131.70-18,127.88-8,418.67

Finding the Fourth Proportional to 13,131.70, 18,127.88 and 8,418.67

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Solution

The fourth proportional to 13,131.70, 18,127.88 and 8,418.67 is: 11,621.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.70 : 18,127.88 = 8,418.67 : x
  2. Step 2: Convert to fraction form
    13,131.70/18,127.88 = 8,418.67/x
  3. Step 3: Cross multiply
    13,131.70x = 18,127.88 × 8,418.67
  4. Step 4: Simplify right side
    13,131.70x = 152,612,639.52
  5. Step 5: Solve for x
    x = 152,612,639.52/13,131.70
  6. Step 6: Final answer
    x = 11,621.70

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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.