Home / 15,479.46-21,361.59-8,405.91

Finding the Fourth Proportional to 15,479.46, 21,361.59 and 8,405.91

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Solution

The fourth proportional to 15,479.46, 21,361.59 and 8,405.91 is: 11,600.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,479.46 : 21,361.59 = 8,405.91 : x
  2. Step 2: Convert to fraction form
    15,479.46/21,361.59 = 8,405.91/x
  3. Step 3: Cross multiply
    15,479.46x = 21,361.59 × 8,405.91
  4. Step 4: Simplify right side
    15,479.46x = 179,563,603.00
  5. Step 5: Solve for x
    x = 179,563,603.00/15,479.46
  6. Step 6: Final answer
    x = 11,600.12

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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.