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Finding the Fourth Proportional to 28,516.50, 42,792.03 and 12,100.50

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Solution

The fourth proportional to 28,516.50, 42,792.03 and 12,100.50 is: 18,158.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,516.50 : 42,792.03 = 12,100.50 : x
  2. Step 2: Convert to fraction form
    28,516.50/42,792.03 = 12,100.50/x
  3. Step 3: Cross multiply
    28,516.50x = 42,792.03 × 12,100.50
  4. Step 4: Simplify right side
    28,516.50x = 517,804,959.02
  5. Step 5: Solve for x
    x = 517,804,959.02/28,516.50
  6. Step 6: Final answer
    x = 18,158.08

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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.