Home / 21,643,505-29,868,975.78-11,985,713

Finding the Fourth Proportional to 21,643,505, 29,868,975.78 and 11,985,713

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Solution

The fourth proportional to 21,643,505, 29,868,975.78 and 11,985,713 is: 16,540,803.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,643,505 : 29,868,975.78 = 11,985,713 : x
  2. Step 2: Convert to fraction form
    21,643,505/29,868,975.78 = 11,985,713/x
  3. Step 3: Cross multiply
    21,643,505x = 29,868,975.78 × 11,985,713
  4. Step 4: Simplify right side
    21,643,505x = 358,000,971,303,031.12
  5. Step 5: Solve for x
    x = 358,000,971,303,031.12/21,643,505
  6. Step 6: Final answer
    x = 16,540,803.87

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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.