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Finding the Fourth Proportional to 18,660,220.60, 27,990,330.90 and 15,471,574.60

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Solution

The fourth proportional to 18,660,220.60, 27,990,330.90 and 15,471,574.60 is: 23,207,361.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660,220.60 : 27,990,330.90 = 15,471,574.60 : x
  2. Step 2: Convert to fraction form
    18,660,220.60/27,990,330.90 = 15,471,574.60/x
  3. Step 3: Cross multiply
    18,660,220.60x = 27,990,330.90 × 15,471,574.60
  4. Step 4: Simplify right side
    18,660,220.60x = 433,054,492,598,035.12
  5. Step 5: Solve for x
    x = 433,054,492,598,035.12/18,660,220.60
  6. Step 6: Final answer
    x = 23,207,361.90

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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.