Home / 20,603.90-28,433.36-11,172.47

Finding the Fourth Proportional to 20,603.90, 28,433.36 and 11,172.47

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Solution

The fourth proportional to 20,603.90, 28,433.36 and 11,172.47 is: 15,417.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.90 : 28,433.36 = 11,172.47 : x
  2. Step 2: Convert to fraction form
    20,603.90/28,433.36 = 11,172.47/x
  3. Step 3: Cross multiply
    20,603.90x = 28,433.36 × 11,172.47
  4. Step 4: Simplify right side
    20,603.90x = 317,670,747.36
  5. Step 5: Solve for x
    x = 317,670,747.36/20,603.90
  6. Step 6: Final answer
    x = 15,417.99

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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.