Home / 15,709.36-21,678.92-8,636.24

Finding the Fourth Proportional to 15,709.36, 21,678.92 and 8,636.24

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Solution

The fourth proportional to 15,709.36, 21,678.92 and 8,636.24 is: 11,918.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.36 : 21,678.92 = 8,636.24 : x
  2. Step 2: Convert to fraction form
    15,709.36/21,678.92 = 8,636.24/x
  3. Step 3: Cross multiply
    15,709.36x = 21,678.92 × 8,636.24
  4. Step 4: Simplify right side
    15,709.36x = 187,224,326.10
  5. Step 5: Solve for x
    x = 187,224,326.10/15,709.36
  6. Step 6: Final answer
    x = 11,918.01

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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.