Home / 20,365,686.78-28,105,656.66-12,633,220.50

Finding the Fourth Proportional to 20,365,686.78, 28,105,656.66 and 12,633,220.50

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Solution

The fourth proportional to 20,365,686.78, 28,105,656.66 and 12,633,220.50 is: 17,434,470.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,365,686.78 : 28,105,656.66 = 12,633,220.50 : x
  2. Step 2: Convert to fraction form
    20,365,686.78/28,105,656.66 = 12,633,220.50/x
  3. Step 3: Cross multiply
    20,365,686.78x = 28,105,656.66 × 12,633,220.50
  4. Step 4: Simplify right side
    20,365,686.78x = 355,064,957,883,073.56
  5. Step 5: Solve for x
    x = 355,064,957,883,073.56/20,365,686.78
  6. Step 6: Final answer
    x = 17,434,470.13

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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.