Home / 18,979.02-28,440.83-13,429.35

Finding the Fourth Proportional to 18,979.02, 28,440.83 and 13,429.35

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Solution

The fourth proportional to 18,979.02, 28,440.83 and 13,429.35 is: 20,124.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.02 : 28,440.83 = 13,429.35 : x
  2. Step 2: Convert to fraction form
    18,979.02/28,440.83 = 13,429.35/x
  3. Step 3: Cross multiply
    18,979.02x = 28,440.83 × 13,429.35
  4. Step 4: Simplify right side
    18,979.02x = 381,941,893.93
  5. Step 5: Solve for x
    x = 381,941,893.93/18,979.02
  6. Step 6: Final answer
    x = 20,124.43

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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.