Home / 20,673.45-28,530.90-12,718.44

Finding the Fourth Proportional to 20,673.45, 28,530.90 and 12,718.44

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Solution

The fourth proportional to 20,673.45, 28,530.90 and 12,718.44 is: 17,552.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.45 : 28,530.90 = 12,718.44 : x
  2. Step 2: Convert to fraction form
    20,673.45/28,530.90 = 12,718.44/x
  3. Step 3: Cross multiply
    20,673.45x = 28,530.90 × 12,718.44
  4. Step 4: Simplify right side
    20,673.45x = 362,868,539.80
  5. Step 5: Solve for x
    x = 362,868,539.80/20,673.45
  6. Step 6: Final answer
    x = 17,552.39

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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.