Home / 30,915.79-42,651.62-20,173.23

Finding the Fourth Proportional to 30,915.79, 42,651.62 and 20,173.23

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Solution

The fourth proportional to 30,915.79, 42,651.62 and 20,173.23 is: 27,831.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,915.79 : 42,651.62 = 20,173.23 : x
  2. Step 2: Convert to fraction form
    30,915.79/42,651.62 = 20,173.23/x
  3. Step 3: Cross multiply
    30,915.79x = 42,651.62 × 20,173.23
  4. Step 4: Simplify right side
    30,915.79x = 860,420,940.13
  5. Step 5: Solve for x
    x = 860,420,940.13/30,915.79
  6. Step 6: Final answer
    x = 27,831.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.