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Finding the Fourth Proportional to 15,678.08, 21,636 and 8,604.48

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Solution

The fourth proportional to 15,678.08, 21,636 and 8,604.48 is: 11,874.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.08 : 21,636 = 8,604.48 : x
  2. Step 2: Convert to fraction form
    15,678.08/21,636 = 8,604.48/x
  3. Step 3: Cross multiply
    15,678.08x = 21,636 × 8,604.48
  4. Step 4: Simplify right side
    15,678.08x = 186,166,529.28
  5. Step 5: Solve for x
    x = 186,166,529.28/15,678.08
  6. Step 6: Final answer
    x = 11,874.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.