Home / 15,619.69-21,555.75-8,904.25

Finding the Fourth Proportional to 15,619.69, 21,555.75 and 8,904.25

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Solution

The fourth proportional to 15,619.69, 21,555.75 and 8,904.25 is: 12,288.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,619.69 : 21,555.75 = 8,904.25 : x
  2. Step 2: Convert to fraction form
    15,619.69/21,555.75 = 8,904.25/x
  3. Step 3: Cross multiply
    15,619.69x = 21,555.75 × 8,904.25
  4. Step 4: Simplify right side
    15,619.69x = 191,937,786.94
  5. Step 5: Solve for x
    x = 191,937,786.94/15,619.69
  6. Step 6: Final answer
    x = 12,288.19

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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.