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Finding the Fourth Proportional to 30,191.80, 45,287.70 and 10,492.60

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Solution

The fourth proportional to 30,191.80, 45,287.70 and 10,492.60 is: 15,738.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,191.80 : 45,287.70 = 10,492.60 : x
  2. Step 2: Convert to fraction form
    30,191.80/45,287.70 = 10,492.60/x
  3. Step 3: Cross multiply
    30,191.80x = 45,287.70 × 10,492.60
  4. Step 4: Simplify right side
    30,191.80x = 475,185,721.02
  5. Step 5: Solve for x
    x = 475,185,721.02/30,191.80
  6. Step 6: Final answer
    x = 15,738.90

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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.