Home / 28,442.90-42,629.74-20,125.32

Finding the Fourth Proportional to 28,442.90, 42,629.74 and 20,125.32

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Solution

The fourth proportional to 28,442.90, 42,629.74 and 20,125.32 is: 30,163.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.90 : 42,629.74 = 20,125.32 : x
  2. Step 2: Convert to fraction form
    28,442.90/42,629.74 = 20,125.32/x
  3. Step 3: Cross multiply
    28,442.90x = 42,629.74 × 20,125.32
  4. Step 4: Simplify right side
    28,442.90x = 857,937,159.02
  5. Step 5: Solve for x
    x = 857,937,159.02/28,442.90
  6. Step 6: Final answer
    x = 30,163.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.