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Finding the Fourth Proportional to 18,705.93, 28,075.29 and 7,612.57

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Solution

The fourth proportional to 18,705.93, 28,075.29 and 7,612.57 is: 11,425.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.93 : 28,075.29 = 7,612.57 : x
  2. Step 2: Convert to fraction form
    18,705.93/28,075.29 = 7,612.57/x
  3. Step 3: Cross multiply
    18,705.93x = 28,075.29 × 7,612.57
  4. Step 4: Simplify right side
    18,705.93x = 213,725,110.40
  5. Step 5: Solve for x
    x = 213,725,110.40/18,705.93
  6. Step 6: Final answer
    x = 11,425.53

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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.