Home / 15,518.45-21,415.16-8,444.72

Finding the Fourth Proportional to 15,518.45, 21,415.16 and 8,444.72

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Solution

The fourth proportional to 15,518.45, 21,415.16 and 8,444.72 is: 11,653.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.45 : 21,415.16 = 8,444.72 : x
  2. Step 2: Convert to fraction form
    15,518.45/21,415.16 = 8,444.72/x
  3. Step 3: Cross multiply
    15,518.45x = 21,415.16 × 8,444.72
  4. Step 4: Simplify right side
    15,518.45x = 180,844,880.66
  5. Step 5: Solve for x
    x = 180,844,880.66/15,518.45
  6. Step 6: Final answer
    x = 11,653.54

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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.