Home / 30,121.65-41,571.72-21,501.21

Finding the Fourth Proportional to 30,121.65, 41,571.72 and 21,501.21

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Solution

The fourth proportional to 30,121.65, 41,571.72 and 21,501.21 is: 29,674.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,121.65 : 41,571.72 = 21,501.21 : x
  2. Step 2: Convert to fraction form
    30,121.65/41,571.72 = 21,501.21/x
  3. Step 3: Cross multiply
    30,121.65x = 41,571.72 × 21,501.21
  4. Step 4: Simplify right side
    30,121.65x = 893,842,281.78
  5. Step 5: Solve for x
    x = 893,842,281.78/30,121.65
  6. Step 6: Final answer
    x = 29,674.41

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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.