Home / 20,685,658.40-31,028,487.60-7,899,581.60

Finding the Fourth Proportional to 20,685,658.40, 31,028,487.60 and 7,899,581.60

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Solution

The fourth proportional to 20,685,658.40, 31,028,487.60 and 7,899,581.60 is: 11,849,372.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685,658.40 : 31,028,487.60 = 7,899,581.60 : x
  2. Step 2: Convert to fraction form
    20,685,658.40/31,028,487.60 = 7,899,581.60/x
  3. Step 3: Cross multiply
    20,685,658.40x = 31,028,487.60 × 7,899,581.60
  4. Step 4: Simplify right side
    20,685,658.40x = 245,112,069,720,788.16
  5. Step 5: Solve for x
    x = 245,112,069,720,788.16/20,685,658.40
  6. Step 6: Final answer
    x = 11,849,372.40

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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.