Home / 13,860.60-19,129.95-7,891.44

Finding the Fourth Proportional to 13,860.60, 19,129.95 and 7,891.44

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Solution

The fourth proportional to 13,860.60, 19,129.95 and 7,891.44 is: 10,891.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,860.60 : 19,129.95 = 7,891.44 : x
  2. Step 2: Convert to fraction form
    13,860.60/19,129.95 = 7,891.44/x
  3. Step 3: Cross multiply
    13,860.60x = 19,129.95 × 7,891.44
  4. Step 4: Simplify right side
    13,860.60x = 150,962,852.63
  5. Step 5: Solve for x
    x = 150,962,852.63/13,860.60
  6. Step 6: Final answer
    x = 10,891.51

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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.