Home / 13,720.50-18,931.02-8,675.82

Finding the Fourth Proportional to 13,720.50, 18,931.02 and 8,675.82

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Solution

The fourth proportional to 13,720.50, 18,931.02 and 8,675.82 is: 11,970.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.50 : 18,931.02 = 8,675.82 : x
  2. Step 2: Convert to fraction form
    13,720.50/18,931.02 = 8,675.82/x
  3. Step 3: Cross multiply
    13,720.50x = 18,931.02 × 8,675.82
  4. Step 4: Simplify right side
    13,720.50x = 164,242,121.94
  5. Step 5: Solve for x
    x = 164,242,121.94/13,720.50
  6. Step 6: Final answer
    x = 11,970.56

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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.