Home / 21,328,365,856.20-29,421,985,979.41-13,187,566,973.59

Finding the Fourth Proportional to 21,328,365,856.20, 29,421,985,979.41 and 13,187,566,973.59

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Solution

The fourth proportional to 21,328,365,856.20, 29,421,985,979.41 and 13,187,566,973.59 is: 18,191,942,749.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328,365,856.20 : 29,421,985,979.41 = 13,187,566,973.59 : x
  2. Step 2: Convert to fraction form
    21,328,365,856.20/29,421,985,979.41 = 13,187,566,973.59/x
  3. Step 3: Cross multiply
    21,328,365,856.20x = 29,421,985,979.41 × 13,187,566,973.59
  4. Step 4: Simplify right side
    21,328,365,856.20x = 388,004,410,599,626,178,560
  5. Step 5: Solve for x
    x = 388,004,410,599,626,178,560/21,328,365,856.20
  6. Step 6: Final answer
    x = 18,191,942,749.65

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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.