Home / 38,515.16-53,151.01-21,519.45

Finding the Fourth Proportional to 38,515.16, 53,151.01 and 21,519.45

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Solution

The fourth proportional to 38,515.16, 53,151.01 and 21,519.45 is: 29,696.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,515.16 : 53,151.01 = 21,519.45 : x
  2. Step 2: Convert to fraction form
    38,515.16/53,151.01 = 21,519.45/x
  3. Step 3: Cross multiply
    38,515.16x = 53,151.01 × 21,519.45
  4. Step 4: Simplify right side
    38,515.16x = 1,143,780,448.35
  5. Step 5: Solve for x
    x = 1,143,780,448.35/38,515.16
  6. Step 6: Final answer
    x = 29,696.89

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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.