Home / 21,516.16-29,648.64-15,537.28

Finding the Fourth Proportional to 21,516.16, 29,648.64 and 15,537.28

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Solution

The fourth proportional to 21,516.16, 29,648.64 and 15,537.28 is: 21,409.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,516.16 : 29,648.64 = 15,537.28 : x
  2. Step 2: Convert to fraction form
    21,516.16/29,648.64 = 15,537.28/x
  3. Step 3: Cross multiply
    21,516.16x = 29,648.64 × 15,537.28
  4. Step 4: Simplify right side
    21,516.16x = 460,659,221.30
  5. Step 5: Solve for x
    x = 460,659,221.30/21,516.16
  6. Step 6: Final answer
    x = 21,409.92

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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.