Home / 10,977.36-16,461.84-5,428.80

Finding the Fourth Proportional to 10,977.36, 16,461.84 and 5,428.80

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Solution

The fourth proportional to 10,977.36, 16,461.84 and 5,428.80 is: 8,141.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,977.36 : 16,461.84 = 5,428.80 : x
  2. Step 2: Convert to fraction form
    10,977.36/16,461.84 = 5,428.80/x
  3. Step 3: Cross multiply
    10,977.36x = 16,461.84 × 5,428.80
  4. Step 4: Simplify right side
    10,977.36x = 89,368,036.99
  5. Step 5: Solve for x
    x = 89,368,036.99/10,977.36
  6. Step 6: Final answer
    x = 8,141.12

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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.