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Finding the Fourth Proportional to 12,539.76, 18,779.74 and 7,263.62

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Solution

The fourth proportional to 12,539.76, 18,779.74 and 7,263.62 is: 10,878.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,539.76 : 18,779.74 = 7,263.62 : x
  2. Step 2: Convert to fraction form
    12,539.76/18,779.74 = 7,263.62/x
  3. Step 3: Cross multiply
    12,539.76x = 18,779.74 × 7,263.62
  4. Step 4: Simplify right side
    12,539.76x = 136,408,895.06
  5. Step 5: Solve for x
    x = 136,408,895.06/12,539.76
  6. Step 6: Final answer
    x = 10,878.11

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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.