Home / 20,830.14-28,745.28-12,445.02

Finding the Fourth Proportional to 20,830.14, 28,745.28 and 12,445.02

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Solution

The fourth proportional to 20,830.14, 28,745.28 and 12,445.02 is: 17,173.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.14 : 28,745.28 = 12,445.02 : x
  2. Step 2: Convert to fraction form
    20,830.14/28,745.28 = 12,445.02/x
  3. Step 3: Cross multiply
    20,830.14x = 28,745.28 × 12,445.02
  4. Step 4: Simplify right side
    20,830.14x = 357,735,584.51
  5. Step 5: Solve for x
    x = 357,735,584.51/20,830.14
  6. Step 6: Final answer
    x = 17,173.94

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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.