Home / 10,518.12-15,777.40-3,123.10

Finding the Fourth Proportional to 10,518.12, 15,777.40 and 3,123.10

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Solution

The fourth proportional to 10,518.12, 15,777.40 and 3,123.10 is: 4,684.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.12 : 15,777.40 = 3,123.10 : x
  2. Step 2: Convert to fraction form
    10,518.12/15,777.40 = 3,123.10/x
  3. Step 3: Cross multiply
    10,518.12x = 15,777.40 × 3,123.10
  4. Step 4: Simplify right side
    10,518.12x = 49,274,319.05
  5. Step 5: Solve for x
    x = 49,274,319.05/10,518.12
  6. Step 6: Final answer
    x = 4,684.71

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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.