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Finding the Fourth Proportional to 28,679.70, 39,580.80 and 16,580.70

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Solution

The fourth proportional to 28,679.70, 39,580.80 and 16,580.70 is: 22,883.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,679.70 : 39,580.80 = 16,580.70 : x
  2. Step 2: Convert to fraction form
    28,679.70/39,580.80 = 16,580.70/x
  3. Step 3: Cross multiply
    28,679.70x = 39,580.80 × 16,580.70
  4. Step 4: Simplify right side
    28,679.70x = 656,277,401.65
  5. Step 5: Solve for x
    x = 656,277,401.65/28,679.70
  6. Step 6: Final answer
    x = 22,883.00

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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.