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Finding the Fourth Proportional to 15,568.58, 21,485.12 and 8,855.18

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Solution

The fourth proportional to 15,568.58, 21,485.12 and 8,855.18 is: 12,220.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,568.58 : 21,485.12 = 8,855.18 : x
  2. Step 2: Convert to fraction form
    15,568.58/21,485.12 = 8,855.18/x
  3. Step 3: Cross multiply
    15,568.58x = 21,485.12 × 8,855.18
  4. Step 4: Simplify right side
    15,568.58x = 190,254,453.22
  5. Step 5: Solve for x
    x = 190,254,453.22/15,568.58
  6. Step 6: Final answer
    x = 12,220.41

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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.