Home / 15,514.03-21,408.81-9,139.15

Finding the Fourth Proportional to 15,514.03, 21,408.81 and 9,139.15

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Solution

The fourth proportional to 15,514.03, 21,408.81 and 9,139.15 is: 12,611.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,514.03 : 21,408.81 = 9,139.15 : x
  2. Step 2: Convert to fraction form
    15,514.03/21,408.81 = 9,139.15/x
  3. Step 3: Cross multiply
    15,514.03x = 21,408.81 × 9,139.15
  4. Step 4: Simplify right side
    15,514.03x = 195,658,325.91
  5. Step 5: Solve for x
    x = 195,658,325.91/15,514.03
  6. Step 6: Final answer
    x = 12,611.70

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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.