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Finding the Fourth Proportional to 28,860, 43,290 and 6,972

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Solution

The fourth proportional to 28,860, 43,290 and 6,972 is: 10,458

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,860 : 43,290 = 6,972 : x
  2. Step 2: Convert to fraction form
    28,860/43,290 = 6,972/x
  3. Step 3: Cross multiply
    28,860x = 43,290 × 6,972
  4. Step 4: Simplify right side
    28,860x = 301,817,880
  5. Step 5: Solve for x
    x = 301,817,880/28,860
  6. Step 6: Final answer
    x = 10,458

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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.