Home / 18,983.34-28,458.81-13,419.18

Finding the Fourth Proportional to 18,983.34, 28,458.81 and 13,419.18

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Solution

The fourth proportional to 18,983.34, 28,458.81 and 13,419.18 is: 20,117.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,983.34 : 28,458.81 = 13,419.18 : x
  2. Step 2: Convert to fraction form
    18,983.34/28,458.81 = 13,419.18/x
  3. Step 3: Cross multiply
    18,983.34x = 28,458.81 × 13,419.18
  4. Step 4: Simplify right side
    18,983.34x = 381,893,893.98
  5. Step 5: Solve for x
    x = 381,893,893.98/18,983.34
  6. Step 6: Final answer
    x = 20,117.32

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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.