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Finding the Fourth Proportional to 38,440.50, 53,047.89 and 20,776.50

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Solution

The fourth proportional to 38,440.50, 53,047.89 and 20,776.50 is: 28,671.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,440.50 : 53,047.89 = 20,776.50 : x
  2. Step 2: Convert to fraction form
    38,440.50/53,047.89 = 20,776.50/x
  3. Step 3: Cross multiply
    38,440.50x = 53,047.89 × 20,776.50
  4. Step 4: Simplify right side
    38,440.50x = 1,102,149,486.59
  5. Step 5: Solve for x
    x = 1,102,149,486.59/38,440.50
  6. Step 6: Final answer
    x = 28,671.57

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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.