Home / 28,175.46-38,880.41-15,428.79

Finding the Fourth Proportional to 28,175.46, 38,880.41 and 15,428.79

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Solution

The fourth proportional to 28,175.46, 38,880.41 and 15,428.79 is: 21,290.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,175.46 : 38,880.41 = 15,428.79 : x
  2. Step 2: Convert to fraction form
    28,175.46/38,880.41 = 15,428.79/x
  3. Step 3: Cross multiply
    28,175.46x = 38,880.41 × 15,428.79
  4. Step 4: Simplify right side
    28,175.46x = 599,877,681.00
  5. Step 5: Solve for x
    x = 599,877,681.00/28,175.46
  6. Step 6: Final answer
    x = 21,290.79

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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.