Home / 38,709,406.81-53,418,570.51-21,305,378.36

Finding the Fourth Proportional to 38,709,406.81, 53,418,570.51 and 21,305,378.36

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Solution

The fourth proportional to 38,709,406.81, 53,418,570.51 and 21,305,378.36 is: 29,401,195.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,709,406.81 : 53,418,570.51 = 21,305,378.36 : x
  2. Step 2: Convert to fraction form
    38,709,406.81/53,418,570.51 = 21,305,378.36/x
  3. Step 3: Cross multiply
    38,709,406.81x = 53,418,570.51 × 21,305,378.36
  4. Step 4: Simplify right side
    38,709,406.81x = 1,138,102,856,165,888
  5. Step 5: Solve for x
    x = 1,138,102,856,165,888/38,709,406.81
  6. Step 6: Final answer
    x = 29,401,195.99

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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.