Home / 13,873.89-19,142.28-7,905.43

Finding the Fourth Proportional to 13,873.89, 19,142.28 and 7,905.43

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Solution

The fourth proportional to 13,873.89, 19,142.28 and 7,905.43 is: 10,907.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,873.89 : 19,142.28 = 7,905.43 : x
  2. Step 2: Convert to fraction form
    13,873.89/19,142.28 = 7,905.43/x
  3. Step 3: Cross multiply
    13,873.89x = 19,142.28 × 7,905.43
  4. Step 4: Simplify right side
    13,873.89x = 151,328,054.58
  5. Step 5: Solve for x
    x = 151,328,054.58/13,873.89
  6. Step 6: Final answer
    x = 10,907.40

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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.