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Finding the Fourth Proportional to 38,430.50, 53,034.09 and 20,766.50

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Solution

The fourth proportional to 38,430.50, 53,034.09 and 20,766.50 is: 28,657.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,430.50 : 53,034.09 = 20,766.50 : x
  2. Step 2: Convert to fraction form
    38,430.50/53,034.09 = 20,766.50/x
  3. Step 3: Cross multiply
    38,430.50x = 53,034.09 × 20,766.50
  4. Step 4: Simplify right side
    38,430.50x = 1,101,332,429.99
  5. Step 5: Solve for x
    x = 1,101,332,429.99/38,430.50
  6. Step 6: Final answer
    x = 28,657.77

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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.