Home / 21,328,365,860.77-29,421,985,985.70-13,187,566,978.17

Finding the Fourth Proportional to 21,328,365,860.77, 29,421,985,985.70 and 13,187,566,978.17

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Solution

The fourth proportional to 21,328,365,860.77, 29,421,985,985.70 and 13,187,566,978.17 is: 18,191,942,755.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328,365,860.77 : 29,421,985,985.70 = 13,187,566,978.17 : x
  2. Step 2: Convert to fraction form
    21,328,365,860.77/29,421,985,985.70 = 13,187,566,978.17/x
  3. Step 3: Cross multiply
    21,328,365,860.77x = 29,421,985,985.70 × 13,187,566,978.17
  4. Step 4: Simplify right side
    21,328,365,860.77x = 388,004,410,817,197,834,240
  5. Step 5: Solve for x
    x = 388,004,410,817,197,834,240/21,328,365,860.77
  6. Step 6: Final answer
    x = 18,191,942,755.96

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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.