Home / 28,186.88-38,880.80-18,626.84

Finding the Fourth Proportional to 28,186.88, 38,880.80 and 18,626.84

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Solution

The fourth proportional to 28,186.88, 38,880.80 and 18,626.84 is: 25,693.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,186.88 : 38,880.80 = 18,626.84 : x
  2. Step 2: Convert to fraction form
    28,186.88/38,880.80 = 18,626.84/x
  3. Step 3: Cross multiply
    28,186.88x = 38,880.80 × 18,626.84
  4. Step 4: Simplify right side
    28,186.88x = 724,226,440.67
  5. Step 5: Solve for x
    x = 724,226,440.67/28,186.88
  6. Step 6: Final answer
    x = 25,693.74

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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.