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Finding the Fourth Proportional to 28,273.60, 42,410.40 and 8,555.20

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Solution

The fourth proportional to 28,273.60, 42,410.40 and 8,555.20 is: 12,832.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,273.60 : 42,410.40 = 8,555.20 : x
  2. Step 2: Convert to fraction form
    28,273.60/42,410.40 = 8,555.20/x
  3. Step 3: Cross multiply
    28,273.60x = 42,410.40 × 8,555.20
  4. Step 4: Simplify right side
    28,273.60x = 362,829,454.08
  5. Step 5: Solve for x
    x = 362,829,454.08/28,273.60
  6. Step 6: Final answer
    x = 12,832.80

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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.