Home / 13,750.18-20,629.36-4,390.80

Finding the Fourth Proportional to 13,750.18, 20,629.36 and 4,390.80

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Solution

The fourth proportional to 13,750.18, 20,629.36 and 4,390.80 is: 6,587.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.18 : 20,629.36 = 4,390.80 : x
  2. Step 2: Convert to fraction form
    13,750.18/20,629.36 = 4,390.80/x
  3. Step 3: Cross multiply
    13,750.18x = 20,629.36 × 4,390.80
  4. Step 4: Simplify right side
    13,750.18x = 90,579,393.89
  5. Step 5: Solve for x
    x = 90,579,393.89/13,750.18
  6. Step 6: Final answer
    x = 6,587.51

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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.