Home / 20,515.77-28,311.93-12,015.99

Finding the Fourth Proportional to 20,515.77, 28,311.93 and 12,015.99

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Solution

The fourth proportional to 20,515.77, 28,311.93 and 12,015.99 is: 16,582.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.77 : 28,311.93 = 12,015.99 : x
  2. Step 2: Convert to fraction form
    20,515.77/28,311.93 = 12,015.99/x
  3. Step 3: Cross multiply
    20,515.77x = 28,311.93 × 12,015.99
  4. Step 4: Simplify right side
    20,515.77x = 340,195,867.76
  5. Step 5: Solve for x
    x = 340,195,867.76/20,515.77
  6. Step 6: Final answer
    x = 16,582.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.