Home / 21,516.17-29,700.77-13,556.91

Finding the Fourth Proportional to 21,516.17, 29,700.77 and 13,556.91

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Solution

The fourth proportional to 21,516.17, 29,700.77 and 13,556.91 is: 18,713.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,516.17 : 29,700.77 = 13,556.91 : x
  2. Step 2: Convert to fraction form
    21,516.17/29,700.77 = 13,556.91/x
  3. Step 3: Cross multiply
    21,516.17x = 29,700.77 × 13,556.91
  4. Step 4: Simplify right side
    21,516.17x = 402,650,699.71
  5. Step 5: Solve for x
    x = 402,650,699.71/21,516.17
  6. Step 6: Final answer
    x = 18,713.87

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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.