Home / 13,690.81-20,539.86-4,331.06

Finding the Fourth Proportional to 13,690.81, 20,539.86 and 4,331.06

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Solution

The fourth proportional to 13,690.81, 20,539.86 and 4,331.06 is: 6,497.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.81 : 20,539.86 = 4,331.06 : x
  2. Step 2: Convert to fraction form
    13,690.81/20,539.86 = 4,331.06/x
  3. Step 3: Cross multiply
    13,690.81x = 20,539.86 × 4,331.06
  4. Step 4: Simplify right side
    13,690.81x = 88,959,366.05
  5. Step 5: Solve for x
    x = 88,959,366.05/13,690.81
  6. Step 6: Final answer
    x = 6,497.74

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1.5x scale

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.