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Finding the Fourth Proportional to 15,561.69, 21,469.01 and 9,582.99

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Solution

The fourth proportional to 15,561.69, 21,469.01 and 9,582.99 is: 13,220.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,561.69 : 21,469.01 = 9,582.99 : x
  2. Step 2: Convert to fraction form
    15,561.69/21,469.01 = 9,582.99/x
  3. Step 3: Cross multiply
    15,561.69x = 21,469.01 × 9,582.99
  4. Step 4: Simplify right side
    15,561.69x = 205,737,308.14
  5. Step 5: Solve for x
    x = 205,737,308.14/15,561.69
  6. Step 6: Final answer
    x = 13,220.76

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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.