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Finding the Fourth Proportional to 38,489.72, 53,112.79 and 21,492.64

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Solution

The fourth proportional to 38,489.72, 53,112.79 and 21,492.64 is: 29,658.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,489.72 : 53,112.79 = 21,492.64 : x
  2. Step 2: Convert to fraction form
    38,489.72/53,112.79 = 21,492.64/x
  3. Step 3: Cross multiply
    38,489.72x = 53,112.79 × 21,492.64
  4. Step 4: Simplify right side
    38,489.72x = 1,141,533,701.84
  5. Step 5: Solve for x
    x = 1,141,533,701.84/38,489.72
  6. Step 6: Final answer
    x = 29,658.15

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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.