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Finding the Fourth Proportional to 28,436.44, 42,664.08 and 8,715.20

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Solution

The fourth proportional to 28,436.44, 42,664.08 and 8,715.20 is: 13,075.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.44 : 42,664.08 = 8,715.20 : x
  2. Step 2: Convert to fraction form
    28,436.44/42,664.08 = 8,715.20/x
  3. Step 3: Cross multiply
    28,436.44x = 42,664.08 × 8,715.20
  4. Step 4: Simplify right side
    28,436.44x = 371,825,990.02
  5. Step 5: Solve for x
    x = 371,825,990.02/28,436.44
  6. Step 6: Final answer
    x = 13,075.69

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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.