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Finding the Fourth Proportional to 38,697.99, 53,400.11 and 21,470.91

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Solution

The fourth proportional to 38,697.99, 53,400.11 and 21,470.91 is: 29,628.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,697.99 : 53,400.11 = 21,470.91 : x
  2. Step 2: Convert to fraction form
    38,697.99/53,400.11 = 21,470.91/x
  3. Step 3: Cross multiply
    38,697.99x = 53,400.11 × 21,470.91
  4. Step 4: Simplify right side
    38,697.99x = 1,146,548,768.97
  5. Step 5: Solve for x
    x = 1,146,548,768.97/38,697.99
  6. Step 6: Final answer
    x = 29,628.12

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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.