Home / 19,683.20-27,172.68-12,520.32

Finding the Fourth Proportional to 19,683.20, 27,172.68 and 12,520.32

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Solution

The fourth proportional to 19,683.20, 27,172.68 and 12,520.32 is: 17,284.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,683.20 : 27,172.68 = 12,520.32 : x
  2. Step 2: Convert to fraction form
    19,683.20/27,172.68 = 12,520.32/x
  3. Step 3: Cross multiply
    19,683.20x = 27,172.68 × 12,520.32
  4. Step 4: Simplify right side
    19,683.20x = 340,210,648.86
  5. Step 5: Solve for x
    x = 340,210,648.86/19,683.20
  6. Step 6: Final answer
    x = 17,284.32

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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.