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Finding the Fourth Proportional to 18,515.58, 27,779.84 and 5,368.74

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Solution

The fourth proportional to 18,515.58, 27,779.84 and 5,368.74 is: 8,054.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.58 : 27,779.84 = 5,368.74 : x
  2. Step 2: Convert to fraction form
    18,515.58/27,779.84 = 5,368.74/x
  3. Step 3: Cross multiply
    18,515.58x = 27,779.84 × 5,368.74
  4. Step 4: Simplify right side
    18,515.58x = 149,142,738.20
  5. Step 5: Solve for x
    x = 149,142,738.20/18,515.58
  6. Step 6: Final answer
    x = 8,054.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.