Home / 10,785.42-16,178.13-3,390.53

Finding the Fourth Proportional to 10,785.42, 16,178.13 and 3,390.53

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Solution

The fourth proportional to 10,785.42, 16,178.13 and 3,390.53 is: 5,085.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,785.42 : 16,178.13 = 3,390.53 : x
  2. Step 2: Convert to fraction form
    10,785.42/16,178.13 = 3,390.53/x
  3. Step 3: Cross multiply
    10,785.42x = 16,178.13 × 3,390.53
  4. Step 4: Simplify right side
    10,785.42x = 54,852,354.22
  5. Step 5: Solve for x
    x = 54,852,354.22/10,785.42
  6. Step 6: Final answer
    x = 5,085.79

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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.