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Finding the Fourth Proportional to 28,640.40, 42,961.32 and 11,114.16

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Solution

The fourth proportional to 28,640.40, 42,961.32 and 11,114.16 is: 16,671.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,640.40 : 42,961.32 = 11,114.16 : x
  2. Step 2: Convert to fraction form
    28,640.40/42,961.32 = 11,114.16/x
  3. Step 3: Cross multiply
    28,640.40x = 42,961.32 × 11,114.16
  4. Step 4: Simplify right side
    28,640.40x = 477,478,984.29
  5. Step 5: Solve for x
    x = 477,478,984.29/28,640.40
  6. Step 6: Final answer
    x = 16,671.52

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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.