Home / 21,215.65-31,668.37-19,673.77

Finding the Fourth Proportional to 21,215.65, 31,668.37 and 19,673.77

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Solution

The fourth proportional to 21,215.65, 31,668.37 and 19,673.77 is: 29,366.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.65 : 31,668.37 = 19,673.77 : x
  2. Step 2: Convert to fraction form
    21,215.65/31,668.37 = 19,673.77/x
  3. Step 3: Cross multiply
    21,215.65x = 31,668.37 × 19,673.77
  4. Step 4: Simplify right side
    21,215.65x = 623,036,227.65
  5. Step 5: Solve for x
    x = 623,036,227.65/21,215.65
  6. Step 6: Final answer
    x = 29,366.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.