Home / 13,686.61-18,880.73-8,839.67

Finding the Fourth Proportional to 13,686.61, 18,880.73 and 8,839.67

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Solution

The fourth proportional to 13,686.61, 18,880.73 and 8,839.67 is: 12,194.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.61 : 18,880.73 = 8,839.67 : x
  2. Step 2: Convert to fraction form
    13,686.61/18,880.73 = 8,839.67/x
  3. Step 3: Cross multiply
    13,686.61x = 18,880.73 × 8,839.67
  4. Step 4: Simplify right side
    13,686.61x = 166,899,353.26
  5. Step 5: Solve for x
    x = 166,899,353.26/13,686.61
  6. Step 6: Final answer
    x = 12,194.36

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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.