Home / 20,578,238.75-28,398,490.89-11,286,178.76

Finding the Fourth Proportional to 20,578,238.75, 28,398,490.89 and 11,286,178.76

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Solution

The fourth proportional to 20,578,238.75, 28,398,490.89 and 11,286,178.76 is: 15,575,212.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578,238.75 : 28,398,490.89 = 11,286,178.76 : x
  2. Step 2: Convert to fraction form
    20,578,238.75/28,398,490.89 = 11,286,178.76/x
  3. Step 3: Cross multiply
    20,578,238.75x = 28,398,490.89 × 11,286,178.76
  4. Step 4: Simplify right side
    20,578,238.75x = 320,510,444,698,771.50
  5. Step 5: Solve for x
    x = 320,510,444,698,771.50/20,578,238.75
  6. Step 6: Final answer
    x = 15,575,212.66

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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.