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Finding the Fourth Proportional to 28,111.50, 42,167.66 and 7,335

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Solution

The fourth proportional to 28,111.50, 42,167.66 and 7,335 is: 11,002.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,111.50 : 42,167.66 = 7,335 : x
  2. Step 2: Convert to fraction form
    28,111.50/42,167.66 = 7,335/x
  3. Step 3: Cross multiply
    28,111.50x = 42,167.66 × 7,335
  4. Step 4: Simplify right side
    28,111.50x = 309,299,749.43
  5. Step 5: Solve for x
    x = 309,299,749.43/28,111.50
  6. Step 6: Final answer
    x = 11,002.61

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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.