Home / 20,004.36-30,009.84-8,318.40

Finding the Fourth Proportional to 20,004.36, 30,009.84 and 8,318.40

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Solution

The fourth proportional to 20,004.36, 30,009.84 and 8,318.40 is: 12,478.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,004.36 : 30,009.84 = 8,318.40 : x
  2. Step 2: Convert to fraction form
    20,004.36/30,009.84 = 8,318.40/x
  3. Step 3: Cross multiply
    20,004.36x = 30,009.84 × 8,318.40
  4. Step 4: Simplify right side
    20,004.36x = 249,633,853.06
  5. Step 5: Solve for x
    x = 249,633,853.06/20,004.36
  6. Step 6: Final answer
    x = 12,478.97

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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.