Home / 13,649.87-18,836.60-7,681.54

Finding the Fourth Proportional to 13,649.87, 18,836.60 and 7,681.54

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Solution

The fourth proportional to 13,649.87, 18,836.60 and 7,681.54 is: 10,600.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,649.87 : 18,836.60 = 7,681.54 : x
  2. Step 2: Convert to fraction form
    13,649.87/18,836.60 = 7,681.54/x
  3. Step 3: Cross multiply
    13,649.87x = 18,836.60 × 7,681.54
  4. Step 4: Simplify right side
    13,649.87x = 144,694,002.18
  5. Step 5: Solve for x
    x = 144,694,002.18/13,649.87
  6. Step 6: Final answer
    x = 10,600.39

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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.