Home / 20,669.10-28,520.82-13,969.32

Finding the Fourth Proportional to 20,669.10, 28,520.82 and 13,969.32

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Solution

The fourth proportional to 20,669.10, 28,520.82 and 13,969.32 is: 19,275.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.10 : 28,520.82 = 13,969.32 : x
  2. Step 2: Convert to fraction form
    20,669.10/28,520.82 = 13,969.32/x
  3. Step 3: Cross multiply
    20,669.10x = 28,520.82 × 13,969.32
  4. Step 4: Simplify right side
    20,669.10x = 398,416,461.24
  5. Step 5: Solve for x
    x = 398,416,461.24/20,669.10
  6. Step 6: Final answer
    x = 19,275.95

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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.