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Finding the Fourth Proportional to 30,321.68, 45,488.64 and 9,540.32

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Solution

The fourth proportional to 30,321.68, 45,488.64 and 9,540.32 is: 14,312.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,321.68 : 45,488.64 = 9,540.32 : x
  2. Step 2: Convert to fraction form
    30,321.68/45,488.64 = 9,540.32/x
  3. Step 3: Cross multiply
    30,321.68x = 45,488.64 × 9,540.32
  4. Step 4: Simplify right side
    30,321.68x = 433,976,181.96
  5. Step 5: Solve for x
    x = 433,976,181.96/30,321.68
  6. Step 6: Final answer
    x = 14,312.41

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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.