Home / 30,926.31-42,678.14-16,778.85

Finding the Fourth Proportional to 30,926.31, 42,678.14 and 16,778.85

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Solution

The fourth proportional to 30,926.31, 42,678.14 and 16,778.85 is: 23,154.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,926.31 : 42,678.14 = 16,778.85 : x
  2. Step 2: Convert to fraction form
    30,926.31/42,678.14 = 16,778.85/x
  3. Step 3: Cross multiply
    30,926.31x = 42,678.14 × 16,778.85
  4. Step 4: Simplify right side
    30,926.31x = 716,090,025.44
  5. Step 5: Solve for x
    x = 716,090,025.44/30,926.31
  6. Step 6: Final answer
    x = 23,154.72

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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.