Home / 28,384.59-39,171.44-15,809.55

Finding the Fourth Proportional to 28,384.59, 39,171.44 and 15,809.55

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Solution

The fourth proportional to 28,384.59, 39,171.44 and 15,809.55 is: 21,817.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,384.59 : 39,171.44 = 15,809.55 : x
  2. Step 2: Convert to fraction form
    28,384.59/39,171.44 = 15,809.55/x
  3. Step 3: Cross multiply
    28,384.59x = 39,171.44 × 15,809.55
  4. Step 4: Simplify right side
    28,384.59x = 619,282,839.25
  5. Step 5: Solve for x
    x = 619,282,839.25/28,384.59
  6. Step 6: Final answer
    x = 21,817.57

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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.