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Finding the Fourth Proportional to 38,987.95, 53,803.37 and 21,082.96

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Solution

The fourth proportional to 38,987.95, 53,803.37 and 21,082.96 is: 29,094.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,987.95 : 53,803.37 = 21,082.96 : x
  2. Step 2: Convert to fraction form
    38,987.95/53,803.37 = 21,082.96/x
  3. Step 3: Cross multiply
    38,987.95x = 53,803.37 × 21,082.96
  4. Step 4: Simplify right side
    38,987.95x = 1,134,334,215.77
  5. Step 5: Solve for x
    x = 1,134,334,215.77/38,987.95
  6. Step 6: Final answer
    x = 29,094.48

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.