Home / 20,653.20-31,004.10-20,507.40

Finding the Fourth Proportional to 20,653.20, 31,004.10 and 20,507.40

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Solution

The fourth proportional to 20,653.20, 31,004.10 and 20,507.40 is: 30,785.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.20 : 31,004.10 = 20,507.40 : x
  2. Step 2: Convert to fraction form
    20,653.20/31,004.10 = 20,507.40/x
  3. Step 3: Cross multiply
    20,653.20x = 31,004.10 × 20,507.40
  4. Step 4: Simplify right side
    20,653.20x = 635,813,480.34
  5. Step 5: Solve for x
    x = 635,813,480.34/20,653.20
  6. Step 6: Final answer
    x = 30,785.23

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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.