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Finding the Fourth Proportional to 51,461.40, 71,018 and 28,800.21

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Solution

The fourth proportional to 51,461.40, 71,018 and 28,800.21 is: 39,745.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,461.40 : 71,018 = 28,800.21 : x
  2. Step 2: Convert to fraction form
    51,461.40/71,018 = 28,800.21/x
  3. Step 3: Cross multiply
    51,461.40x = 71,018 × 28,800.21
  4. Step 4: Simplify right side
    51,461.40x = 2,045,333,313.78
  5. Step 5: Solve for x
    x = 2,045,333,313.78/51,461.40
  6. Step 6: Final answer
    x = 39,745.00

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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.