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Finding the Fourth Proportional to 28,111.86, 42,167.80 and 8,404.27

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Solution

The fourth proportional to 28,111.86, 42,167.80 and 8,404.27 is: 12,606.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,111.86 : 42,167.80 = 8,404.27 : x
  2. Step 2: Convert to fraction form
    28,111.86/42,167.80 = 8,404.27/x
  3. Step 3: Cross multiply
    28,111.86x = 42,167.80 × 8,404.27
  4. Step 4: Simplify right side
    28,111.86x = 354,389,576.51
  5. Step 5: Solve for x
    x = 354,389,576.51/28,111.86
  6. Step 6: Final answer
    x = 12,606.41

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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.