Home / 21,123,991.70-31,685,987.55-5,167,639.70

Finding the Fourth Proportional to 21,123,991.70, 31,685,987.55 and 5,167,639.70

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Solution

The fourth proportional to 21,123,991.70, 31,685,987.55 and 5,167,639.70 is: 7,751,459.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123,991.70 : 31,685,987.55 = 5,167,639.70 : x
  2. Step 2: Convert to fraction form
    21,123,991.70/31,685,987.55 = 5,167,639.70/x
  3. Step 3: Cross multiply
    21,123,991.70x = 31,685,987.55 × 5,167,639.70
  4. Step 4: Simplify right side
    21,123,991.70x = 163,741,767,197,085.75
  5. Step 5: Solve for x
    x = 163,741,767,197,085.75/21,123,991.70
  6. Step 6: Final answer
    x = 7,751,459.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.