Home / 20,311.68-28,038.72-13,244.16

Finding the Fourth Proportional to 20,311.68, 28,038.72 and 13,244.16

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Solution

The fourth proportional to 20,311.68, 28,038.72 and 13,244.16 is: 18,282.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.68 : 28,038.72 = 13,244.16 : x
  2. Step 2: Convert to fraction form
    20,311.68/28,038.72 = 13,244.16/x
  3. Step 3: Cross multiply
    20,311.68x = 28,038.72 × 13,244.16
  4. Step 4: Simplify right side
    20,311.68x = 371,349,293.88
  5. Step 5: Solve for x
    x = 371,349,293.88/20,311.68
  6. Step 6: Final answer
    x = 18,282.55

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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.