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Finding the Fourth Proportional to 18,430.20, 25,871.40 and 18,430.20

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Solution

The fourth proportional to 18,430.20, 25,871.40 and 18,430.20 is: 25,871.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,430.20 : 25,871.40 = 18,430.20 : x
  2. Step 2: Convert to fraction form
    18,430.20/25,871.40 = 18,430.20/x
  3. Step 3: Cross multiply
    18,430.20x = 25,871.40 × 18,430.20
  4. Step 4: Simplify right side
    18,430.20x = 476,815,076.28
  5. Step 5: Solve for x
    x = 476,815,076.28/18,430.20
  6. Step 6: Final answer
    x = 25,871.40

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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.