Home / 10,865.20-16,281.60-9,212.80

Finding the Fourth Proportional to 10,865.20, 16,281.60 and 9,212.80

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Solution

The fourth proportional to 10,865.20, 16,281.60 and 9,212.80 is: 13,805.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,865.20 : 16,281.60 = 9,212.80 : x
  2. Step 2: Convert to fraction form
    10,865.20/16,281.60 = 9,212.80/x
  3. Step 3: Cross multiply
    10,865.20x = 16,281.60 × 9,212.80
  4. Step 4: Simplify right side
    10,865.20x = 149,999,124.48
  5. Step 5: Solve for x
    x = 149,999,124.48/10,865.20
  6. Step 6: Final answer
    x = 13,805.46

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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.