Home / 21,127.72-31,698.60-7,089.12

Finding the Fourth Proportional to 21,127.72, 31,698.60 and 7,089.12

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Solution

The fourth proportional to 21,127.72, 31,698.60 and 7,089.12 is: 10,636.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.72 : 31,698.60 = 7,089.12 : x
  2. Step 2: Convert to fraction form
    21,127.72/31,698.60 = 7,089.12/x
  3. Step 3: Cross multiply
    21,127.72x = 31,698.60 × 7,089.12
  4. Step 4: Simplify right side
    21,127.72x = 224,715,179.23
  5. Step 5: Solve for x
    x = 224,715,179.23/21,127.72
  6. Step 6: Final answer
    x = 10,636.04

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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.