Home / 38,965.68-53,771.55-21,969.78

Finding the Fourth Proportional to 38,965.68, 53,771.55 and 21,969.78

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Solution

The fourth proportional to 38,965.68, 53,771.55 and 21,969.78 is: 30,317.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,965.68 : 53,771.55 = 21,969.78 : x
  2. Step 2: Convert to fraction form
    38,965.68/53,771.55 = 21,969.78/x
  3. Step 3: Cross multiply
    38,965.68x = 53,771.55 × 21,969.78
  4. Step 4: Simplify right side
    38,965.68x = 1,181,349,123.76
  5. Step 5: Solve for x
    x = 1,181,349,123.76/38,965.68
  6. Step 6: Final answer
    x = 30,317.68

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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.