Home / 30,488.20-45,732.30-19,990.60

Finding the Fourth Proportional to 30,488.20, 45,732.30 and 19,990.60

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Solution

The fourth proportional to 30,488.20, 45,732.30 and 19,990.60 is: 29,985.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,488.20 : 45,732.30 = 19,990.60 : x
  2. Step 2: Convert to fraction form
    30,488.20/45,732.30 = 19,990.60/x
  3. Step 3: Cross multiply
    30,488.20x = 45,732.30 × 19,990.60
  4. Step 4: Simplify right side
    30,488.20x = 914,216,116.38
  5. Step 5: Solve for x
    x = 914,216,116.38/30,488.20
  6. Step 6: Final answer
    x = 29,985.90

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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.