Home / 20,643.36-30,940.68-8,931.84

Finding the Fourth Proportional to 20,643.36, 30,940.68 and 8,931.84

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Solution

The fourth proportional to 20,643.36, 30,940.68 and 8,931.84 is: 13,387.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.36 : 30,940.68 = 8,931.84 : x
  2. Step 2: Convert to fraction form
    20,643.36/30,940.68 = 8,931.84/x
  3. Step 3: Cross multiply
    20,643.36x = 30,940.68 × 8,931.84
  4. Step 4: Simplify right side
    20,643.36x = 276,357,203.25
  5. Step 5: Solve for x
    x = 276,357,203.25/20,643.36
  6. Step 6: Final answer
    x = 13,387.22

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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.