Home / 20,816.68-31,196.16-11,445.40

Finding the Fourth Proportional to 20,816.68, 31,196.16 and 11,445.40

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Solution

The fourth proportional to 20,816.68, 31,196.16 and 11,445.40 is: 17,152.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.68 : 31,196.16 = 11,445.40 : x
  2. Step 2: Convert to fraction form
    20,816.68/31,196.16 = 11,445.40/x
  3. Step 3: Cross multiply
    20,816.68x = 31,196.16 × 11,445.40
  4. Step 4: Simplify right side
    20,816.68x = 357,052,529.66
  5. Step 5: Solve for x
    x = 357,052,529.66/20,816.68
  6. Step 6: Final answer
    x = 17,152.23

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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.