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Finding the Fourth Proportional to 38,705, 53,413.52 and 21,713.03

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Solution

The fourth proportional to 38,705, 53,413.52 and 21,713.03 is: 29,964.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,705 : 53,413.52 = 21,713.03 : x
  2. Step 2: Convert to fraction form
    38,705/53,413.52 = 21,713.03/x
  3. Step 3: Cross multiply
    38,705x = 53,413.52 × 21,713.03
  4. Step 4: Simplify right side
    38,705x = 1,159,769,362.17
  5. Step 5: Solve for x
    x = 1,159,769,362.17/38,705
  6. Step 6: Final answer
    x = 29,964.33

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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.