Home / 39,902.45-55,063.01-21,998.21

Finding the Fourth Proportional to 39,902.45, 55,063.01 and 21,998.21

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Solution

The fourth proportional to 39,902.45, 55,063.01 and 21,998.21 is: 30,356.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,902.45 : 55,063.01 = 21,998.21 : x
  2. Step 2: Convert to fraction form
    39,902.45/55,063.01 = 21,998.21/x
  3. Step 3: Cross multiply
    39,902.45x = 55,063.01 × 21,998.21
  4. Step 4: Simplify right side
    39,902.45x = 1,211,287,547.22
  5. Step 5: Solve for x
    x = 1,211,287,547.22/39,902.45
  6. Step 6: Final answer
    x = 30,356.22

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Half scale
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Double scale
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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.