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Finding the Fourth Proportional to 28,497.84, 42,751.68 and 12,708.48

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Solution

The fourth proportional to 28,497.84, 42,751.68 and 12,708.48 is: 19,064.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,497.84 : 42,751.68 = 12,708.48 : x
  2. Step 2: Convert to fraction form
    28,497.84/42,751.68 = 12,708.48/x
  3. Step 3: Cross multiply
    28,497.84x = 42,751.68 × 12,708.48
  4. Step 4: Simplify right side
    28,497.84x = 543,308,870.25
  5. Step 5: Solve for x
    x = 543,308,870.25/28,497.84
  6. Step 6: Final answer
    x = 19,064.91

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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.