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Finding the Fourth Proportional to 28,620, 42,932.16 and 10,152

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Solution

The fourth proportional to 28,620, 42,932.16 and 10,152 is: 15,228.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,620 : 42,932.16 = 10,152 : x
  2. Step 2: Convert to fraction form
    28,620/42,932.16 = 10,152/x
  3. Step 3: Cross multiply
    28,620x = 42,932.16 × 10,152
  4. Step 4: Simplify right side
    28,620x = 435,847,288.32
  5. Step 5: Solve for x
    x = 435,847,288.32/28,620
  6. Step 6: Final answer
    x = 15,228.77

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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.