Home / 10,816.80-16,225.20-7,123.20

Finding the Fourth Proportional to 10,816.80, 16,225.20 and 7,123.20

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Solution

The fourth proportional to 10,816.80, 16,225.20 and 7,123.20 is: 10,684.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,816.80 : 16,225.20 = 7,123.20 : x
  2. Step 2: Convert to fraction form
    10,816.80/16,225.20 = 7,123.20/x
  3. Step 3: Cross multiply
    10,816.80x = 16,225.20 × 7,123.20
  4. Step 4: Simplify right side
    10,816.80x = 115,575,344.64
  5. Step 5: Solve for x
    x = 115,575,344.64/10,816.80
  6. Step 6: Final answer
    x = 10,684.80

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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.