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Finding the Fourth Proportional to 28,611.88, 42,929.63 and 15,448.75

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Solution

The fourth proportional to 28,611.88, 42,929.63 and 15,448.75 is: 23,179.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,611.88 : 42,929.63 = 15,448.75 : x
  2. Step 2: Convert to fraction form
    28,611.88/42,929.63 = 15,448.75/x
  3. Step 3: Cross multiply
    28,611.88x = 42,929.63 × 15,448.75
  4. Step 4: Simplify right side
    28,611.88x = 663,209,121.46
  5. Step 5: Solve for x
    x = 663,209,121.46/28,611.88
  6. Step 6: Final answer
    x = 23,179.50

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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.