Home / 15,518.07-21,408.27-12,147.35

Finding the Fourth Proportional to 15,518.07, 21,408.27 and 12,147.35

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Solution

The fourth proportional to 15,518.07, 21,408.27 and 12,147.35 is: 16,758.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.07 : 21,408.27 = 12,147.35 : x
  2. Step 2: Convert to fraction form
    15,518.07/21,408.27 = 12,147.35/x
  3. Step 3: Cross multiply
    15,518.07x = 21,408.27 × 12,147.35
  4. Step 4: Simplify right side
    15,518.07x = 260,053,641.54
  5. Step 5: Solve for x
    x = 260,053,641.54/15,518.07
  6. Step 6: Final answer
    x = 16,758.12

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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.