Home / 10,087.98-15,136.20-5,406.80

Finding the Fourth Proportional to 10,087.98, 15,136.20 and 5,406.80

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Solution

The fourth proportional to 10,087.98, 15,136.20 and 5,406.80 is: 8,112.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,087.98 : 15,136.20 = 5,406.80 : x
  2. Step 2: Convert to fraction form
    10,087.98/15,136.20 = 5,406.80/x
  3. Step 3: Cross multiply
    10,087.98x = 15,136.20 × 5,406.80
  4. Step 4: Simplify right side
    10,087.98x = 81,838,406.16
  5. Step 5: Solve for x
    x = 81,838,406.16/10,087.98
  6. Step 6: Final answer
    x = 8,112.47

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1.5x scale

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.