Home / 21,780,939.20-32,671,408.80-7,420,222.40

Finding the Fourth Proportional to 21,780,939.20, 32,671,408.80 and 7,420,222.40

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Solution

The fourth proportional to 21,780,939.20, 32,671,408.80 and 7,420,222.40 is: 11,130,333.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780,939.20 : 32,671,408.80 = 7,420,222.40 : x
  2. Step 2: Convert to fraction form
    21,780,939.20/32,671,408.80 = 7,420,222.40/x
  3. Step 3: Cross multiply
    21,780,939.20x = 32,671,408.80 × 7,420,222.40
  4. Step 4: Simplify right side
    21,780,939.20x = 242,429,119,417,317.12
  5. Step 5: Solve for x
    x = 242,429,119,417,317.12/21,780,939.20
  6. Step 6: Final answer
    x = 11,130,333.60

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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.