Home / 20,520,419.40-28,315,689.48-11,821,408.20

Finding the Fourth Proportional to 20,520,419.40, 28,315,689.48 and 11,821,408.20

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Solution

The fourth proportional to 20,520,419.40, 28,315,689.48 and 11,821,408.20 is: 16,312,109.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520,419.40 : 28,315,689.48 = 11,821,408.20 : x
  2. Step 2: Convert to fraction form
    20,520,419.40/28,315,689.48 = 11,821,408.20/x
  3. Step 3: Cross multiply
    20,520,419.40x = 28,315,689.48 × 11,821,408.20
  4. Step 4: Simplify right side
    20,520,419.40x = 334,731,323,807,525.75
  5. Step 5: Solve for x
    x = 334,731,323,807,525.75/20,520,419.40
  6. Step 6: Final answer
    x = 16,312,109.28

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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.