Home / 21,516.62-29,684.63-15,864.77

Finding the Fourth Proportional to 21,516.62, 29,684.63 and 15,864.77

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Solution

The fourth proportional to 21,516.62, 29,684.63 and 15,864.77 is: 21,887.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,516.62 : 29,684.63 = 15,864.77 : x
  2. Step 2: Convert to fraction form
    21,516.62/29,684.63 = 15,864.77/x
  3. Step 3: Cross multiply
    21,516.62x = 29,684.63 × 15,864.77
  4. Step 4: Simplify right side
    21,516.62x = 470,939,941.36
  5. Step 5: Solve for x
    x = 470,939,941.36/21,516.62
  6. Step 6: Final answer
    x = 21,887.27

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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.