Home / 20,957.58-28,920.16-12,003.04

Finding the Fourth Proportional to 20,957.58, 28,920.16 and 12,003.04

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Solution

The fourth proportional to 20,957.58, 28,920.16 and 12,003.04 is: 16,563.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.58 : 28,920.16 = 12,003.04 : x
  2. Step 2: Convert to fraction form
    20,957.58/28,920.16 = 12,003.04/x
  3. Step 3: Cross multiply
    20,957.58x = 28,920.16 × 12,003.04
  4. Step 4: Simplify right side
    20,957.58x = 347,129,837.29
  5. Step 5: Solve for x
    x = 347,129,837.29/20,957.58
  6. Step 6: Final answer
    x = 16,563.45

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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.