Home / 20,804.64-28,708.72-12,306.24

Finding the Fourth Proportional to 20,804.64, 28,708.72 and 12,306.24

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Solution

The fourth proportional to 20,804.64, 28,708.72 and 12,306.24 is: 16,981.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.64 : 28,708.72 = 12,306.24 : x
  2. Step 2: Convert to fraction form
    20,804.64/28,708.72 = 12,306.24/x
  3. Step 3: Cross multiply
    20,804.64x = 28,708.72 × 12,306.24
  4. Step 4: Simplify right side
    20,804.64x = 353,296,398.41
  5. Step 5: Solve for x
    x = 353,296,398.41/20,804.64
  6. Step 6: Final answer
    x = 16,981.62

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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.