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Finding the Fourth Proportional to 28,495.84, 42,748.68 and 12,706.48

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Solution

The fourth proportional to 28,495.84, 42,748.68 and 12,706.48 is: 19,061.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,495.84 : 42,748.68 = 12,706.48 : x
  2. Step 2: Convert to fraction form
    28,495.84/42,748.68 = 12,706.48/x
  3. Step 3: Cross multiply
    28,495.84x = 42,748.68 × 12,706.48
  4. Step 4: Simplify right side
    28,495.84x = 543,185,247.45
  5. Step 5: Solve for x
    x = 543,185,247.45/28,495.84
  6. Step 6: Final answer
    x = 19,061.91

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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.