Home / 38,420.69-53,021.49-21,424.77

Finding the Fourth Proportional to 38,420.69, 53,021.49 and 21,424.77

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Solution

The fourth proportional to 38,420.69, 53,021.49 and 21,424.77 is: 29,566.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,420.69 : 53,021.49 = 21,424.77 : x
  2. Step 2: Convert to fraction form
    38,420.69/53,021.49 = 21,424.77/x
  3. Step 3: Cross multiply
    38,420.69x = 53,021.49 × 21,424.77
  4. Step 4: Simplify right side
    38,420.69x = 1,135,973,228.31
  5. Step 5: Solve for x
    x = 1,135,973,228.31/38,420.69
  6. Step 6: Final answer
    x = 29,566.71

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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.