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Finding the Fourth Proportional to 38,411.60, 57,622.80 and 12,113.60

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Solution

The fourth proportional to 38,411.60, 57,622.80 and 12,113.60 is: 18,172.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,411.60 : 57,622.80 = 12,113.60 : x
  2. Step 2: Convert to fraction form
    38,411.60/57,622.80 = 12,113.60/x
  3. Step 3: Cross multiply
    38,411.60x = 57,622.80 × 12,113.60
  4. Step 4: Simplify right side
    38,411.60x = 698,019,550.08
  5. Step 5: Solve for x
    x = 698,019,550.08/38,411.60
  6. Step 6: Final answer
    x = 18,172.10

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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.