Home / 28,142.64-42,167.11-19,805.16

Finding the Fourth Proportional to 28,142.64, 42,167.11 and 19,805.16

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Solution

The fourth proportional to 28,142.64, 42,167.11 and 19,805.16 is: 29,674.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,142.64 : 42,167.11 = 19,805.16 : x
  2. Step 2: Convert to fraction form
    28,142.64/42,167.11 = 19,805.16/x
  3. Step 3: Cross multiply
    28,142.64x = 42,167.11 × 19,805.16
  4. Step 4: Simplify right side
    28,142.64x = 835,126,213.14
  5. Step 5: Solve for x
    x = 835,126,213.14/28,142.64
  6. Step 6: Final answer
    x = 29,674.76

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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.