Home / 20,709.20-31,084.40-9,618.40

Finding the Fourth Proportional to 20,709.20, 31,084.40 and 9,618.40

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Solution

The fourth proportional to 20,709.20, 31,084.40 and 9,618.40 is: 14,437.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.20 : 31,084.40 = 9,618.40 : x
  2. Step 2: Convert to fraction form
    20,709.20/31,084.40 = 9,618.40/x
  3. Step 3: Cross multiply
    20,709.20x = 31,084.40 × 9,618.40
  4. Step 4: Simplify right side
    20,709.20x = 298,982,192.96
  5. Step 5: Solve for x
    x = 298,982,192.96/20,709.20
  6. Step 6: Final answer
    x = 14,437.17

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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.