Home / 13,931.46-20,870.20-8,668.54

Finding the Fourth Proportional to 13,931.46, 20,870.20 and 8,668.54

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Solution

The fourth proportional to 13,931.46, 20,870.20 and 8,668.54 is: 12,986.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.46 : 20,870.20 = 8,668.54 : x
  2. Step 2: Convert to fraction form
    13,931.46/20,870.20 = 8,668.54/x
  3. Step 3: Cross multiply
    13,931.46x = 20,870.20 × 8,668.54
  4. Step 4: Simplify right side
    13,931.46x = 180,914,163.51
  5. Step 5: Solve for x
    x = 180,914,163.51/13,931.46
  6. Step 6: Final answer
    x = 12,986.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.