Home / 20,321.08-28,043.10-11,368.59

Finding the Fourth Proportional to 20,321.08, 28,043.10 and 11,368.59

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Solution

The fourth proportional to 20,321.08, 28,043.10 and 11,368.59 is: 15,688.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.08 : 28,043.10 = 11,368.59 : x
  2. Step 2: Convert to fraction form
    20,321.08/28,043.10 = 11,368.59/x
  3. Step 3: Cross multiply
    20,321.08x = 28,043.10 × 11,368.59
  4. Step 4: Simplify right side
    20,321.08x = 318,810,506.23
  5. Step 5: Solve for x
    x = 318,810,506.23/20,321.08
  6. Step 6: Final answer
    x = 15,688.66

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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.