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Finding the Fourth Proportional to 38,988.52, 53,802.12 and 21,992.26

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Solution

The fourth proportional to 38,988.52, 53,802.12 and 21,992.26 is: 30,348.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,988.52 : 53,802.12 = 21,992.26 : x
  2. Step 2: Convert to fraction form
    38,988.52/53,802.12 = 21,992.26/x
  3. Step 3: Cross multiply
    38,988.52x = 53,802.12 × 21,992.26
  4. Step 4: Simplify right side
    38,988.52x = 1,183,230,211.59
  5. Step 5: Solve for x
    x = 1,183,230,211.59/38,988.52
  6. Step 6: Final answer
    x = 30,348.17

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Similar ratio
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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.