Home / 15,504.23-21,396.05-8,789.69

Finding the Fourth Proportional to 15,504.23, 21,396.05 and 8,789.69

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Solution

The fourth proportional to 15,504.23, 21,396.05 and 8,789.69 is: 12,129.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504.23 : 21,396.05 = 8,789.69 : x
  2. Step 2: Convert to fraction form
    15,504.23/21,396.05 = 8,789.69/x
  3. Step 3: Cross multiply
    15,504.23x = 21,396.05 × 8,789.69
  4. Step 4: Simplify right side
    15,504.23x = 188,064,495.80
  5. Step 5: Solve for x
    x = 188,064,495.80/15,504.23
  6. Step 6: Final answer
    x = 12,129.89

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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.