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Finding the Fourth Proportional to 28,364.63, 42,553.07 and 8,642.66

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Solution

The fourth proportional to 28,364.63, 42,553.07 and 8,642.66 is: 12,965.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,364.63 : 42,553.07 = 8,642.66 : x
  2. Step 2: Convert to fraction form
    28,364.63/42,553.07 = 8,642.66/x
  3. Step 3: Cross multiply
    28,364.63x = 42,553.07 × 8,642.66
  4. Step 4: Simplify right side
    28,364.63x = 367,771,459.99
  5. Step 5: Solve for x
    x = 367,771,459.99/28,364.63
  6. Step 6: Final answer
    x = 12,965.85

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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.