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Finding the Fourth Proportional to 21,392.10, 32,027.40 and 20,228.40

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Solution

The fourth proportional to 21,392.10, 32,027.40 and 20,228.40 is: 30,285.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,392.10 : 32,027.40 = 20,228.40 : x
  2. Step 2: Convert to fraction form
    21,392.10/32,027.40 = 20,228.40/x
  3. Step 3: Cross multiply
    21,392.10x = 32,027.40 × 20,228.40
  4. Step 4: Simplify right side
    21,392.10x = 647,863,058.16
  5. Step 5: Solve for x
    x = 647,863,058.16/21,392.10
  6. Step 6: Final answer
    x = 30,285.15

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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.