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Finding the Fourth Proportional to 28,603.84, 42,905.76 and 18,805.12

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Solution

The fourth proportional to 28,603.84, 42,905.76 and 18,805.12 is: 28,207.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,603.84 : 42,905.76 = 18,805.12 : x
  2. Step 2: Convert to fraction form
    28,603.84/42,905.76 = 18,805.12/x
  3. Step 3: Cross multiply
    28,603.84x = 42,905.76 × 18,805.12
  4. Step 4: Simplify right side
    28,603.84x = 806,847,965.49
  5. Step 5: Solve for x
    x = 806,847,965.49/28,603.84
  6. Step 6: Final answer
    x = 28,207.68

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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.