Home / 15,515.82-21,412.59-9,144.30

Finding the Fourth Proportional to 15,515.82, 21,412.59 and 9,144.30

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Solution

The fourth proportional to 15,515.82, 21,412.59 and 9,144.30 is: 12,619.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.82 : 21,412.59 = 9,144.30 : x
  2. Step 2: Convert to fraction form
    15,515.82/21,412.59 = 9,144.30/x
  3. Step 3: Cross multiply
    15,515.82x = 21,412.59 × 9,144.30
  4. Step 4: Simplify right side
    15,515.82x = 195,803,146.74
  5. Step 5: Solve for x
    x = 195,803,146.74/15,515.82
  6. Step 6: Final answer
    x = 12,619.58

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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.