Home / 20,813.34-28,722.68-12,315.24

Finding the Fourth Proportional to 20,813.34, 28,722.68 and 12,315.24

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Solution

The fourth proportional to 20,813.34, 28,722.68 and 12,315.24 is: 16,995.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.34 : 28,722.68 = 12,315.24 : x
  2. Step 2: Convert to fraction form
    20,813.34/28,722.68 = 12,315.24/x
  3. Step 3: Cross multiply
    20,813.34x = 28,722.68 × 12,315.24
  4. Step 4: Simplify right side
    20,813.34x = 353,726,697.64
  5. Step 5: Solve for x
    x = 353,726,697.64/20,813.34
  6. Step 6: Final answer
    x = 16,995.19

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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.