Home / 15,555.78-21,467.19-8,482.20

Finding the Fourth Proportional to 15,555.78, 21,467.19 and 8,482.20

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Solution

The fourth proportional to 15,555.78, 21,467.19 and 8,482.20 is: 11,705.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,555.78 : 21,467.19 = 8,482.20 : x
  2. Step 2: Convert to fraction form
    15,555.78/21,467.19 = 8,482.20/x
  3. Step 3: Cross multiply
    15,555.78x = 21,467.19 × 8,482.20
  4. Step 4: Simplify right side
    15,555.78x = 182,088,999.02
  5. Step 5: Solve for x
    x = 182,088,999.02/15,555.78
  6. Step 6: Final answer
    x = 11,705.55

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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.