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Finding the Fourth Proportional to 18,392.78, 25,389.74 and 12,432.52

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Solution

The fourth proportional to 18,392.78, 25,389.74 and 12,432.52 is: 17,162.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,392.78 : 25,389.74 = 12,432.52 : x
  2. Step 2: Convert to fraction form
    18,392.78/25,389.74 = 12,432.52/x
  3. Step 3: Cross multiply
    18,392.78x = 25,389.74 × 12,432.52
  4. Step 4: Simplify right side
    18,392.78x = 315,658,417.95
  5. Step 5: Solve for x
    x = 315,658,417.95/18,392.78
  6. Step 6: Final answer
    x = 17,162.09

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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.