Home / 30,246.30-45,369.45-20,915.10

Finding the Fourth Proportional to 30,246.30, 45,369.45 and 20,915.10

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Solution

The fourth proportional to 30,246.30, 45,369.45 and 20,915.10 is: 31,372.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,246.30 : 45,369.45 = 20,915.10 : x
  2. Step 2: Convert to fraction form
    30,246.30/45,369.45 = 20,915.10/x
  3. Step 3: Cross multiply
    30,246.30x = 45,369.45 × 20,915.10
  4. Step 4: Simplify right side
    30,246.30x = 948,906,583.70
  5. Step 5: Solve for x
    x = 948,906,583.70/30,246.30
  6. Step 6: Final answer
    x = 31,372.65

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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.