Home / 21,117.34-29,141.76-11,686.42

Finding the Fourth Proportional to 21,117.34, 29,141.76 and 11,686.42

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Solution

The fourth proportional to 21,117.34, 29,141.76 and 11,686.42 is: 16,127.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.34 : 29,141.76 = 11,686.42 : x
  2. Step 2: Convert to fraction form
    21,117.34/29,141.76 = 11,686.42/x
  3. Step 3: Cross multiply
    21,117.34x = 29,141.76 × 11,686.42
  4. Step 4: Simplify right side
    21,117.34x = 340,562,846.90
  5. Step 5: Solve for x
    x = 340,562,846.90/21,117.34
  6. Step 6: Final answer
    x = 16,127.17

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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.