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Finding the Fourth Proportional to 19,435.20, 26,813.60 and 12,363.20

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Solution

The fourth proportional to 19,435.20, 26,813.60 and 12,363.20 is: 17,056.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,435.20 : 26,813.60 = 12,363.20 : x
  2. Step 2: Convert to fraction form
    19,435.20/26,813.60 = 12,363.20/x
  3. Step 3: Cross multiply
    19,435.20x = 26,813.60 × 12,363.20
  4. Step 4: Simplify right side
    19,435.20x = 331,501,899.52
  5. Step 5: Solve for x
    x = 331,501,899.52/19,435.20
  6. Step 6: Final answer
    x = 17,056.78

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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.