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Finding the Fourth Proportional to 28,368.63, 42,555.33 and 8,647.34

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Solution

The fourth proportional to 28,368.63, 42,555.33 and 8,647.34 is: 12,971.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,368.63 : 42,555.33 = 8,647.34 : x
  2. Step 2: Convert to fraction form
    28,368.63/42,555.33 = 8,647.34/x
  3. Step 3: Cross multiply
    28,368.63x = 42,555.33 × 8,647.34
  4. Step 4: Simplify right side
    28,368.63x = 367,990,194.55
  5. Step 5: Solve for x
    x = 367,990,194.55/28,368.63
  6. Step 6: Final answer
    x = 12,971.73

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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.