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Finding the Fourth Proportional to 28,706.56, 43,038.72 and 8,974.08

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Solution

The fourth proportional to 28,706.56, 43,038.72 and 8,974.08 is: 13,454.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,706.56 : 43,038.72 = 8,974.08 : x
  2. Step 2: Convert to fraction form
    28,706.56/43,038.72 = 8,974.08/x
  3. Step 3: Cross multiply
    28,706.56x = 43,038.72 × 8,974.08
  4. Step 4: Simplify right side
    28,706.56x = 386,232,916.38
  5. Step 5: Solve for x
    x = 386,232,916.38/28,706.56
  6. Step 6: Final answer
    x = 13,454.52

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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.