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Finding the Fourth Proportional to 18,439,189.20, 25,764,476.40 and 18,439,189.20

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Solution

The fourth proportional to 18,439,189.20, 25,764,476.40 and 18,439,189.20 is: 25,764,476.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,439,189.20 : 25,764,476.40 = 18,439,189.20 : x
  2. Step 2: Convert to fraction form
    18,439,189.20/25,764,476.40 = 18,439,189.20/x
  3. Step 3: Cross multiply
    18,439,189.20x = 25,764,476.40 × 18,439,189.20
  4. Step 4: Simplify right side
    18,439,189.20x = 475,076,054,978,534.81
  5. Step 5: Solve for x
    x = 475,076,054,978,534.81/18,439,189.20
  6. Step 6: Final answer
    x = 25,764,476.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.