Home / 15,491.93-21,378.99-8,418.35

Finding the Fourth Proportional to 15,491.93, 21,378.99 and 8,418.35

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Solution

The fourth proportional to 15,491.93, 21,378.99 and 8,418.35 is: 11,617.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,491.93 : 21,378.99 = 8,418.35 : x
  2. Step 2: Convert to fraction form
    15,491.93/21,378.99 = 8,418.35/x
  3. Step 3: Cross multiply
    15,491.93x = 21,378.99 × 8,418.35
  4. Step 4: Simplify right side
    15,491.93x = 179,975,820.47
  5. Step 5: Solve for x
    x = 179,975,820.47/15,491.93
  6. Step 6: Final answer
    x = 11,617.39

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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.