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Finding the Fourth Proportional to 28,476, 39,296.88 and 15,900.84

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Solution

The fourth proportional to 28,476, 39,296.88 and 15,900.84 is: 21,943.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,476 : 39,296.88 = 15,900.84 : x
  2. Step 2: Convert to fraction form
    28,476/39,296.88 = 15,900.84/x
  3. Step 3: Cross multiply
    28,476x = 39,296.88 × 15,900.84
  4. Step 4: Simplify right side
    28,476x = 624,853,401.38
  5. Step 5: Solve for x
    x = 624,853,401.38/28,476
  6. Step 6: Final answer
    x = 21,943.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.