Home / 13,958.47-19,261.69-7,990.05

Finding the Fourth Proportional to 13,958.47, 19,261.69 and 7,990.05

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Solution

The fourth proportional to 13,958.47, 19,261.69 and 7,990.05 is: 11,025.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,958.47 : 19,261.69 = 7,990.05 : x
  2. Step 2: Convert to fraction form
    13,958.47/19,261.69 = 7,990.05/x
  3. Step 3: Cross multiply
    13,958.47x = 19,261.69 × 7,990.05
  4. Step 4: Simplify right side
    13,958.47x = 153,901,846.21
  5. Step 5: Solve for x
    x = 153,901,846.21/13,958.47
  6. Step 6: Final answer
    x = 11,025.70

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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.