Home / 18,987.79-26,195.12-12,702.19

Finding the Fourth Proportional to 18,987.79, 26,195.12 and 12,702.19

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Solution

The fourth proportional to 18,987.79, 26,195.12 and 12,702.19 is: 17,523.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.79 : 26,195.12 = 12,702.19 : x
  2. Step 2: Convert to fraction form
    18,987.79/26,195.12 = 12,702.19/x
  3. Step 3: Cross multiply
    18,987.79x = 26,195.12 × 12,702.19
  4. Step 4: Simplify right side
    18,987.79x = 332,735,327.80
  5. Step 5: Solve for x
    x = 332,735,327.80/18,987.79
  6. Step 6: Final answer
    x = 17,523.65

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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.