Home / 21,328,365,858.51-29,421,985,982.60-13,187,566,975.91

Finding the Fourth Proportional to 21,328,365,858.51, 29,421,985,982.60 and 13,187,566,975.91

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Solution

The fourth proportional to 21,328,365,858.51, 29,421,985,982.60 and 13,187,566,975.91 is: 18,191,942,752.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328,365,858.51 : 29,421,985,982.60 = 13,187,566,975.91 : x
  2. Step 2: Convert to fraction form
    21,328,365,858.51/29,421,985,982.60 = 13,187,566,975.91/x
  3. Step 3: Cross multiply
    21,328,365,858.51x = 29,421,985,982.60 × 13,187,566,975.91
  4. Step 4: Simplify right side
    21,328,365,858.51x = 388,004,410,709,822,668,800
  5. Step 5: Solve for x
    x = 388,004,410,709,822,668,800/21,328,365,858.51
  6. Step 6: Final answer
    x = 18,191,942,752.85

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1.5x scale

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.