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Finding the Fourth Proportional to 30,610.80, 45,851.40 and 20,113.20

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Solution

The fourth proportional to 30,610.80, 45,851.40 and 20,113.20 is: 30,127.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,610.80 : 45,851.40 = 20,113.20 : x
  2. Step 2: Convert to fraction form
    30,610.80/45,851.40 = 20,113.20/x
  3. Step 3: Cross multiply
    30,610.80x = 45,851.40 × 20,113.20
  4. Step 4: Simplify right side
    30,610.80x = 922,218,378.48
  5. Step 5: Solve for x
    x = 922,218,378.48/30,610.80
  6. Step 6: Final answer
    x = 30,127.22

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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.