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Finding the Fourth Proportional to 28,803.84, 39,756.80 and 18,759.84

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Solution

The fourth proportional to 28,803.84, 39,756.80 and 18,759.84 is: 25,893.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,803.84 : 39,756.80 = 18,759.84 : x
  2. Step 2: Convert to fraction form
    28,803.84/39,756.80 = 18,759.84/x
  3. Step 3: Cross multiply
    28,803.84x = 39,756.80 × 18,759.84
  4. Step 4: Simplify right side
    28,803.84x = 745,831,206.91
  5. Step 5: Solve for x
    x = 745,831,206.91/28,803.84
  6. Step 6: Final answer
    x = 25,893.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.