Home / 12,305.30-18,460.48-3,987.40

Finding the Fourth Proportional to 12,305.30, 18,460.48 and 3,987.40

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Solution

The fourth proportional to 12,305.30, 18,460.48 and 3,987.40 is: 5,981.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,305.30 : 18,460.48 = 3,987.40 : x
  2. Step 2: Convert to fraction form
    12,305.30/18,460.48 = 3,987.40/x
  3. Step 3: Cross multiply
    12,305.30x = 18,460.48 × 3,987.40
  4. Step 4: Simplify right side
    12,305.30x = 73,609,317.95
  5. Step 5: Solve for x
    x = 73,609,317.95/12,305.30
  6. Step 6: Final answer
    x = 5,981.92

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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.