Home / 13,143.20-18,136.02-7,478.67

Finding the Fourth Proportional to 13,143.20, 18,136.02 and 7,478.67

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Solution

The fourth proportional to 13,143.20, 18,136.02 and 7,478.67 is: 10,319.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.20 : 18,136.02 = 7,478.67 : x
  2. Step 2: Convert to fraction form
    13,143.20/18,136.02 = 7,478.67/x
  3. Step 3: Cross multiply
    13,143.20x = 18,136.02 × 7,478.67
  4. Step 4: Simplify right side
    13,143.20x = 135,633,336.74
  5. Step 5: Solve for x
    x = 135,633,336.74/13,143.20
  6. Step 6: Final answer
    x = 10,319.66

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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.