Home / 20,312.21-28,033.46-11,360.21

Finding the Fourth Proportional to 20,312.21, 28,033.46 and 11,360.21

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Solution

The fourth proportional to 20,312.21, 28,033.46 and 11,360.21 is: 15,678.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,312.21 : 28,033.46 = 11,360.21 : x
  2. Step 2: Convert to fraction form
    20,312.21/28,033.46 = 11,360.21/x
  3. Step 3: Cross multiply
    20,312.21x = 28,033.46 × 11,360.21
  4. Step 4: Simplify right side
    20,312.21x = 318,465,992.63
  5. Step 5: Solve for x
    x = 318,465,992.63/20,312.21
  6. Step 6: Final answer
    x = 15,678.55

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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.