Home / 20,622.99-30,894.69-12,309.66

Finding the Fourth Proportional to 20,622.99, 30,894.69 and 12,309.66

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Solution

The fourth proportional to 20,622.99, 30,894.69 and 12,309.66 is: 18,440.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.99 : 30,894.69 = 12,309.66 : x
  2. Step 2: Convert to fraction form
    20,622.99/30,894.69 = 12,309.66/x
  3. Step 3: Cross multiply
    20,622.99x = 30,894.69 × 12,309.66
  4. Step 4: Simplify right side
    20,622.99x = 380,303,129.71
  5. Step 5: Solve for x
    x = 380,303,129.71/20,622.99
  6. Step 6: Final answer
    x = 18,440.74

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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.