Home / 20,479.17-30,706.14-9,389.28

Finding the Fourth Proportional to 20,479.17, 30,706.14 and 9,389.28

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Solution

The fourth proportional to 20,479.17, 30,706.14 and 9,389.28 is: 14,078.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.17 : 30,706.14 = 9,389.28 : x
  2. Step 2: Convert to fraction form
    20,479.17/30,706.14 = 9,389.28/x
  3. Step 3: Cross multiply
    20,479.17x = 30,706.14 × 9,389.28
  4. Step 4: Simplify right side
    20,479.17x = 288,308,546.18
  5. Step 5: Solve for x
    x = 288,308,546.18/20,479.17
  6. Step 6: Final answer
    x = 14,078.14

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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.