Home / 13,890.06-19,169.47-7,921.98

Finding the Fourth Proportional to 13,890.06, 19,169.47 and 7,921.98

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Solution

The fourth proportional to 13,890.06, 19,169.47 and 7,921.98 is: 10,933.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.06 : 19,169.47 = 7,921.98 : x
  2. Step 2: Convert to fraction form
    13,890.06/19,169.47 = 7,921.98/x
  3. Step 3: Cross multiply
    13,890.06x = 19,169.47 × 7,921.98
  4. Step 4: Simplify right side
    13,890.06x = 151,860,157.95
  5. Step 5: Solve for x
    x = 151,860,157.95/13,890.06
  6. Step 6: Final answer
    x = 10,933.01

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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.