Home / 12,656.98-18,987.63-3,891.70

Finding the Fourth Proportional to 12,656.98, 18,987.63 and 3,891.70

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Solution

The fourth proportional to 12,656.98, 18,987.63 and 3,891.70 is: 5,838.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.98 : 18,987.63 = 3,891.70 : x
  2. Step 2: Convert to fraction form
    12,656.98/18,987.63 = 3,891.70/x
  3. Step 3: Cross multiply
    12,656.98x = 18,987.63 × 3,891.70
  4. Step 4: Simplify right side
    12,656.98x = 73,894,159.67
  5. Step 5: Solve for x
    x = 73,894,159.67/12,656.98
  6. Step 6: Final answer
    x = 5,838.21

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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.