Home / 20,138.14-30,206.58-9,615.70

Finding the Fourth Proportional to 20,138.14, 30,206.58 and 9,615.70

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Solution

The fourth proportional to 20,138.14, 30,206.58 and 9,615.70 is: 14,423.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.14 : 30,206.58 = 9,615.70 : x
  2. Step 2: Convert to fraction form
    20,138.14/30,206.58 = 9,615.70/x
  3. Step 3: Cross multiply
    20,138.14x = 30,206.58 × 9,615.70
  4. Step 4: Simplify right side
    20,138.14x = 290,457,411.31
  5. Step 5: Solve for x
    x = 290,457,411.31/20,138.14
  6. Step 6: Final answer
    x = 14,423.25

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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.