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Finding the Fourth Proportional to 28,403.50, 42,611.50 and 8,411.44

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Solution

The fourth proportional to 28,403.50, 42,611.50 and 8,411.44 is: 12,619.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,403.50 : 42,611.50 = 8,411.44 : x
  2. Step 2: Convert to fraction form
    28,403.50/42,611.50 = 8,411.44/x
  3. Step 3: Cross multiply
    28,403.50x = 42,611.50 × 8,411.44
  4. Step 4: Simplify right side
    28,403.50x = 358,424,075.56
  5. Step 5: Solve for x
    x = 358,424,075.56/28,403.50
  6. Step 6: Final answer
    x = 12,619.01

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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.