Home / 39,889.48-55,046.76-21,740.36

Finding the Fourth Proportional to 39,889.48, 55,046.76 and 21,740.36

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Solution

The fourth proportional to 39,889.48, 55,046.76 and 21,740.36 is: 30,001.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,889.48 : 55,046.76 = 21,740.36 : x
  2. Step 2: Convert to fraction form
    39,889.48/55,046.76 = 21,740.36/x
  3. Step 3: Cross multiply
    39,889.48x = 55,046.76 × 21,740.36
  4. Step 4: Simplify right side
    39,889.48x = 1,196,736,379.23
  5. Step 5: Solve for x
    x = 1,196,736,379.23/39,889.48
  6. Step 6: Final answer
    x = 30,001.30

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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.