Home / 21,663.19-29,897.20-13,163.34

Finding the Fourth Proportional to 21,663.19, 29,897.20 and 13,163.34

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Solution

The fourth proportional to 21,663.19, 29,897.20 and 13,163.34 is: 18,166.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,663.19 : 29,897.20 = 13,163.34 : x
  2. Step 2: Convert to fraction form
    21,663.19/29,897.20 = 13,163.34/x
  3. Step 3: Cross multiply
    21,663.19x = 29,897.20 × 13,163.34
  4. Step 4: Simplify right side
    21,663.19x = 393,547,008.65
  5. Step 5: Solve for x
    x = 393,547,008.65/21,663.19
  6. Step 6: Final answer
    x = 18,166.62

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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.