Home / 20,945,420.30-28,892,643.69-13,091,301.86

Finding the Fourth Proportional to 20,945,420.30, 28,892,643.69 and 13,091,301.86

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Solution

The fourth proportional to 20,945,420.30, 28,892,643.69 and 13,091,301.86 is: 18,058,473.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945,420.30 : 28,892,643.69 = 13,091,301.86 : x
  2. Step 2: Convert to fraction form
    20,945,420.30/28,892,643.69 = 13,091,301.86/x
  3. Step 3: Cross multiply
    20,945,420.30x = 28,892,643.69 × 13,091,301.86
  4. Step 4: Simplify right side
    20,945,420.30x = 378,242,319,934,751.06
  5. Step 5: Solve for x
    x = 378,242,319,934,751.06/20,945,420.30
  6. Step 6: Final answer
    x = 18,058,473.62

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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.