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Finding the Fourth Proportional to 15,346.62, 21,178.22 and 8,722.62

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Solution

The fourth proportional to 15,346.62, 21,178.22 and 8,722.62 is: 12,037.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,346.62 : 21,178.22 = 8,722.62 : x
  2. Step 2: Convert to fraction form
    15,346.62/21,178.22 = 8,722.62/x
  3. Step 3: Cross multiply
    15,346.62x = 21,178.22 × 8,722.62
  4. Step 4: Simplify right side
    15,346.62x = 184,729,565.34
  5. Step 5: Solve for x
    x = 184,729,565.34/15,346.62
  6. Step 6: Final answer
    x = 12,037.15

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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.