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Finding the Fourth Proportional to 28,239.95, 42,347.63 and 9,516.50

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Solution

The fourth proportional to 28,239.95, 42,347.63 and 9,516.50 is: 14,270.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.95 : 42,347.63 = 9,516.50 : x
  2. Step 2: Convert to fraction form
    28,239.95/42,347.63 = 9,516.50/x
  3. Step 3: Cross multiply
    28,239.95x = 42,347.63 × 9,516.50
  4. Step 4: Simplify right side
    28,239.95x = 403,001,220.90
  5. Step 5: Solve for x
    x = 403,001,220.90/28,239.95
  6. Step 6: Final answer
    x = 14,270.61

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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.