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Finding the Fourth Proportional to 18,574.90, 25,622.13 and 12,289.30

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Solution

The fourth proportional to 18,574.90, 25,622.13 and 12,289.30 is: 16,951.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,574.90 : 25,622.13 = 12,289.30 : x
  2. Step 2: Convert to fraction form
    18,574.90/25,622.13 = 12,289.30/x
  3. Step 3: Cross multiply
    18,574.90x = 25,622.13 × 12,289.30
  4. Step 4: Simplify right side
    18,574.90x = 314,878,042.21
  5. Step 5: Solve for x
    x = 314,878,042.21/18,574.90
  6. Step 6: Final answer
    x = 16,951.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.