Home / 20,551.58-28,345.92-12,485.20

Finding the Fourth Proportional to 20,551.58, 28,345.92 and 12,485.20

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Solution

The fourth proportional to 20,551.58, 28,345.92 and 12,485.20 is: 17,220.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.58 : 28,345.92 = 12,485.20 : x
  2. Step 2: Convert to fraction form
    20,551.58/28,345.92 = 12,485.20/x
  3. Step 3: Cross multiply
    20,551.58x = 28,345.92 × 12,485.20
  4. Step 4: Simplify right side
    20,551.58x = 353,904,480.38
  5. Step 5: Solve for x
    x = 353,904,480.38/20,551.58
  6. Step 6: Final answer
    x = 17,220.31

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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.