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Finding the Fourth Proportional to 19,633.60, 29,439.60 and 8,538.40

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Solution

The fourth proportional to 19,633.60, 29,439.60 and 8,538.40 is: 12,802.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,633.60 : 29,439.60 = 8,538.40 : x
  2. Step 2: Convert to fraction form
    19,633.60/29,439.60 = 8,538.40/x
  3. Step 3: Cross multiply
    19,633.60x = 29,439.60 × 8,538.40
  4. Step 4: Simplify right side
    19,633.60x = 251,367,080.64
  5. Step 5: Solve for x
    x = 251,367,080.64/19,633.60
  6. Step 6: Final answer
    x = 12,802.90

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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.