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Finding the Fourth Proportional to 30,866.45, 42,595.73 and 16,719.30

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Solution

The fourth proportional to 30,866.45, 42,595.73 and 16,719.30 is: 23,072.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,866.45 : 42,595.73 = 16,719.30 : x
  2. Step 2: Convert to fraction form
    30,866.45/42,595.73 = 16,719.30/x
  3. Step 3: Cross multiply
    30,866.45x = 42,595.73 × 16,719.30
  4. Step 4: Simplify right side
    30,866.45x = 712,170,704.99
  5. Step 5: Solve for x
    x = 712,170,704.99/30,866.45
  6. Step 6: Final answer
    x = 23,072.65

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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.