Home / 30,252.30-45,378.45-20,921.10

Finding the Fourth Proportional to 30,252.30, 45,378.45 and 20,921.10

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Solution

The fourth proportional to 30,252.30, 45,378.45 and 20,921.10 is: 31,381.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,252.30 : 45,378.45 = 20,921.10 : x
  2. Step 2: Convert to fraction form
    30,252.30/45,378.45 = 20,921.10/x
  3. Step 3: Cross multiply
    30,252.30x = 45,378.45 × 20,921.10
  4. Step 4: Simplify right side
    30,252.30x = 949,367,090.30
  5. Step 5: Solve for x
    x = 949,367,090.30/30,252.30
  6. Step 6: Final answer
    x = 31,381.65

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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.