Home / 20,807.36-28,714.20-12,847.76

Finding the Fourth Proportional to 20,807.36, 28,714.20 and 12,847.76

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Solution

The fourth proportional to 20,807.36, 28,714.20 and 12,847.76 is: 17,729.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.36 : 28,714.20 = 12,847.76 : x
  2. Step 2: Convert to fraction form
    20,807.36/28,714.20 = 12,847.76/x
  3. Step 3: Cross multiply
    20,807.36x = 28,714.20 × 12,847.76
  4. Step 4: Simplify right side
    20,807.36x = 368,913,150.19
  5. Step 5: Solve for x
    x = 368,913,150.19/20,807.36
  6. Step 6: Final answer
    x = 17,729.94

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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.