Home / 21,072.16-31,641.12-20,137.36

Finding the Fourth Proportional to 21,072.16, 31,641.12 and 20,137.36

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Solution

The fourth proportional to 21,072.16, 31,641.12 and 20,137.36 is: 30,237.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.16 : 31,641.12 = 20,137.36 : x
  2. Step 2: Convert to fraction form
    21,072.16/31,641.12 = 20,137.36/x
  3. Step 3: Cross multiply
    21,072.16x = 31,641.12 × 20,137.36
  4. Step 4: Simplify right side
    21,072.16x = 637,168,624.24
  5. Step 5: Solve for x
    x = 637,168,624.24/21,072.16
  6. Step 6: Final answer
    x = 30,237.46

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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.