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Finding the Fourth Proportional to 21,698.60, 32,505.86 and 12,310.22

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Solution

The fourth proportional to 21,698.60, 32,505.86 and 12,310.22 is: 18,441.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,698.60 : 32,505.86 = 12,310.22 : x
  2. Step 2: Convert to fraction form
    21,698.60/32,505.86 = 12,310.22/x
  3. Step 3: Cross multiply
    21,698.60x = 32,505.86 × 12,310.22
  4. Step 4: Simplify right side
    21,698.60x = 400,154,063.81
  5. Step 5: Solve for x
    x = 400,154,063.81/21,698.60
  6. Step 6: Final answer
    x = 18,441.47

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1.5x scale

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.