Home / 20,288.61-30,428.06-6,960.06

Finding the Fourth Proportional to 20,288.61, 30,428.06 and 6,960.06

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Solution

The fourth proportional to 20,288.61, 30,428.06 and 6,960.06 is: 10,438.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.61 : 30,428.06 = 6,960.06 : x
  2. Step 2: Convert to fraction form
    20,288.61/30,428.06 = 6,960.06/x
  3. Step 3: Cross multiply
    20,288.61x = 30,428.06 × 6,960.06
  4. Step 4: Simplify right side
    20,288.61x = 211,781,088.48
  5. Step 5: Solve for x
    x = 211,781,088.48/20,288.61
  6. Step 6: Final answer
    x = 10,438.42

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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.