Home / 20,603.94-28,433.48-11,172.44

Finding the Fourth Proportional to 20,603.94, 28,433.48 and 11,172.44

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Solution

The fourth proportional to 20,603.94, 28,433.48 and 11,172.44 is: 15,417.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.94 : 28,433.48 = 11,172.44 : x
  2. Step 2: Convert to fraction form
    20,603.94/28,433.48 = 11,172.44/x
  3. Step 3: Cross multiply
    20,603.94x = 28,433.48 × 11,172.44
  4. Step 4: Simplify right side
    20,603.94x = 317,671,151.26
  5. Step 5: Solve for x
    x = 317,671,151.26/20,603.94
  6. Step 6: Final answer
    x = 15,417.98

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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.