Home / 21,457,516.50-29,689,348.56-18,709,929.42

Finding the Fourth Proportional to 21,457,516.50, 29,689,348.56 and 18,709,929.42

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Solution

The fourth proportional to 21,457,516.50, 29,689,348.56 and 18,709,929.42 is: 25,887,693.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,457,516.50 : 29,689,348.56 = 18,709,929.42 : x
  2. Step 2: Convert to fraction form
    21,457,516.50/29,689,348.56 = 18,709,929.42/x
  3. Step 3: Cross multiply
    21,457,516.50x = 29,689,348.56 × 18,709,929.42
  4. Step 4: Simplify right side
    21,457,516.50x = 555,485,616,083,378.69
  5. Step 5: Solve for x
    x = 555,485,616,083,378.69/21,457,516.50
  6. Step 6: Final answer
    x = 25,887,693.76

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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.