Home / 15,555.90-21,467.60-8,841.81

Finding the Fourth Proportional to 15,555.90, 21,467.60 and 8,841.81

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Solution

The fourth proportional to 15,555.90, 21,467.60 and 8,841.81 is: 12,201.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,555.90 : 21,467.60 = 8,841.81 : x
  2. Step 2: Convert to fraction form
    15,555.90/21,467.60 = 8,841.81/x
  3. Step 3: Cross multiply
    15,555.90x = 21,467.60 × 8,841.81
  4. Step 4: Simplify right side
    15,555.90x = 189,812,440.36
  5. Step 5: Solve for x
    x = 189,812,440.36/15,555.90
  6. Step 6: Final answer
    x = 12,201.96

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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.