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Finding the Fourth Proportional to 14,482.78, 19,987.91 and 8,820.85

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Solution

The fourth proportional to 14,482.78, 19,987.91 and 8,820.85 is: 12,173.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,482.78 : 19,987.91 = 8,820.85 : x
  2. Step 2: Convert to fraction form
    14,482.78/19,987.91 = 8,820.85/x
  3. Step 3: Cross multiply
    14,482.78x = 19,987.91 × 8,820.85
  4. Step 4: Simplify right side
    14,482.78x = 176,310,328.01
  5. Step 5: Solve for x
    x = 176,310,328.01/14,482.78
  6. Step 6: Final answer
    x = 12,173.79

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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.