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Finding the Fourth Proportional to 18,758.90, 25,890.74 and 12,052.91

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Solution

The fourth proportional to 18,758.90, 25,890.74 and 12,052.91 is: 16,635.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.90 : 25,890.74 = 12,052.91 : x
  2. Step 2: Convert to fraction form
    18,758.90/25,890.74 = 12,052.91/x
  3. Step 3: Cross multiply
    18,758.90x = 25,890.74 × 12,052.91
  4. Step 4: Simplify right side
    18,758.90x = 312,058,569.34
  5. Step 5: Solve for x
    x = 312,058,569.34/18,758.90
  6. Step 6: Final answer
    x = 16,635.23

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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.