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Finding the Fourth Proportional to 28,378.45, 42,558.05 and 9,653.48

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Solution

The fourth proportional to 28,378.45, 42,558.05 and 9,653.48 is: 14,476.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,378.45 : 42,558.05 = 9,653.48 : x
  2. Step 2: Convert to fraction form
    28,378.45/42,558.05 = 9,653.48/x
  3. Step 3: Cross multiply
    28,378.45x = 42,558.05 × 9,653.48
  4. Step 4: Simplify right side
    28,378.45x = 410,833,071.72
  5. Step 5: Solve for x
    x = 410,833,071.72/28,378.45
  6. Step 6: Final answer
    x = 14,476.94

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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.