Home / 18,731.65-28,097.37-7,638.30

Finding the Fourth Proportional to 18,731.65, 28,097.37 and 7,638.30

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Solution

The fourth proportional to 18,731.65, 28,097.37 and 7,638.30 is: 11,457.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.65 : 28,097.37 = 7,638.30 : x
  2. Step 2: Convert to fraction form
    18,731.65/28,097.37 = 7,638.30/x
  3. Step 3: Cross multiply
    18,731.65x = 28,097.37 × 7,638.30
  4. Step 4: Simplify right side
    18,731.65x = 214,616,141.27
  5. Step 5: Solve for x
    x = 214,616,141.27/18,731.65
  6. Step 6: Final answer
    x = 11,457.41

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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.