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Finding the Fourth Proportional to 28,706.51, 43,036.53 and 8,974.91

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Solution

The fourth proportional to 28,706.51, 43,036.53 and 8,974.91 is: 13,455.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,706.51 : 43,036.53 = 8,974.91 : x
  2. Step 2: Convert to fraction form
    28,706.51/43,036.53 = 8,974.91/x
  3. Step 3: Cross multiply
    28,706.51x = 43,036.53 × 8,974.91
  4. Step 4: Simplify right side
    28,706.51x = 386,248,983.46
  5. Step 5: Solve for x
    x = 386,248,983.46/28,706.51
  6. Step 6: Final answer
    x = 13,455.10

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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.