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Finding the Fourth Proportional to 28,652.40, 42,976.62 and 8,929.08

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Solution

The fourth proportional to 28,652.40, 42,976.62 and 8,929.08 is: 13,393.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,652.40 : 42,976.62 = 8,929.08 : x
  2. Step 2: Convert to fraction form
    28,652.40/42,976.62 = 8,929.08/x
  3. Step 3: Cross multiply
    28,652.40x = 42,976.62 × 8,929.08
  4. Step 4: Simplify right side
    28,652.40x = 383,741,678.11
  5. Step 5: Solve for x
    x = 383,741,678.11/28,652.40
  6. Step 6: Final answer
    x = 13,393.00

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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.