Home / 20,603.62-28,432.74-11,172.16

Finding the Fourth Proportional to 20,603.62, 28,432.74 and 11,172.16

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Solution

The fourth proportional to 20,603.62, 28,432.74 and 11,172.16 is: 15,417.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.62 : 28,432.74 = 11,172.16 : x
  2. Step 2: Convert to fraction form
    20,603.62/28,432.74 = 11,172.16/x
  3. Step 3: Cross multiply
    20,603.62x = 28,432.74 × 11,172.16
  4. Step 4: Simplify right side
    20,603.62x = 317,655,120.52
  5. Step 5: Solve for x
    x = 317,655,120.52/20,603.62
  6. Step 6: Final answer
    x = 15,417.44

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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.