Home / 15,123.53-20,861.62-9,821.88

Finding the Fourth Proportional to 15,123.53, 20,861.62 and 9,821.88

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Solution

The fourth proportional to 15,123.53, 20,861.62 and 9,821.88 is: 13,548.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,123.53 : 20,861.62 = 9,821.88 : x
  2. Step 2: Convert to fraction form
    15,123.53/20,861.62 = 9,821.88/x
  3. Step 3: Cross multiply
    15,123.53x = 20,861.62 × 9,821.88
  4. Step 4: Simplify right side
    15,123.53x = 204,900,303.69
  5. Step 5: Solve for x
    x = 204,900,303.69/15,123.53
  6. Step 6: Final answer
    x = 13,548.44

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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.