Home / 13,760.20-18,987.78-9,515.80

Finding the Fourth Proportional to 13,760.20, 18,987.78 and 9,515.80

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Solution

The fourth proportional to 13,760.20, 18,987.78 and 9,515.80 is: 13,130.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,760.20 : 18,987.78 = 9,515.80 : x
  2. Step 2: Convert to fraction form
    13,760.20/18,987.78 = 9,515.80/x
  3. Step 3: Cross multiply
    13,760.20x = 18,987.78 × 9,515.80
  4. Step 4: Simplify right side
    13,760.20x = 180,683,916.92
  5. Step 5: Solve for x
    x = 180,683,916.92/13,760.20
  6. Step 6: Final answer
    x = 13,130.91

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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.