Home / 21,290.72-31,925.38-12,408.92

Finding the Fourth Proportional to 21,290.72, 31,925.38 and 12,408.92

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Solution

The fourth proportional to 21,290.72, 31,925.38 and 12,408.92 is: 18,607.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.72 : 31,925.38 = 12,408.92 : x
  2. Step 2: Convert to fraction form
    21,290.72/31,925.38 = 12,408.92/x
  3. Step 3: Cross multiply
    21,290.72x = 31,925.38 × 12,408.92
  4. Step 4: Simplify right side
    21,290.72x = 396,159,486.39
  5. Step 5: Solve for x
    x = 396,159,486.39/21,290.72
  6. Step 6: Final answer
    x = 18,607.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.