Home / 15,665.99-21,606.84-9,700.97

Finding the Fourth Proportional to 15,665.99, 21,606.84 and 9,700.97

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Solution

The fourth proportional to 15,665.99, 21,606.84 and 9,700.97 is: 13,379.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.99 : 21,606.84 = 9,700.97 : x
  2. Step 2: Convert to fraction form
    15,665.99/21,606.84 = 9,700.97/x
  3. Step 3: Cross multiply
    15,665.99x = 21,606.84 × 9,700.97
  4. Step 4: Simplify right side
    15,665.99x = 209,607,198.60
  5. Step 5: Solve for x
    x = 209,607,198.60/15,665.99
  6. Step 6: Final answer
    x = 13,379.77

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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.