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Finding the Fourth Proportional to 28,495.60, 42,638.60 and 17,784.77

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Solution

The fourth proportional to 28,495.60, 42,638.60 and 17,784.77 is: 26,611.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,495.60 : 42,638.60 = 17,784.77 : x
  2. Step 2: Convert to fraction form
    28,495.60/42,638.60 = 17,784.77/x
  3. Step 3: Cross multiply
    28,495.60x = 42,638.60 × 17,784.77
  4. Step 4: Simplify right side
    28,495.60x = 758,317,525.39
  5. Step 5: Solve for x
    x = 758,317,525.39/28,495.60
  6. Step 6: Final answer
    x = 26,611.74

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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.