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Finding the Fourth Proportional to 28,363.60, 42,561.60 and 19,604.80

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Solution

The fourth proportional to 28,363.60, 42,561.60 and 19,604.80 is: 29,418.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,363.60 : 42,561.60 = 19,604.80 : x
  2. Step 2: Convert to fraction form
    28,363.60/42,561.60 = 19,604.80/x
  3. Step 3: Cross multiply
    28,363.60x = 42,561.60 × 19,604.80
  4. Step 4: Simplify right side
    28,363.60x = 834,411,655.68
  5. Step 5: Solve for x
    x = 834,411,655.68/28,363.60
  6. Step 6: Final answer
    x = 29,418.40

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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.