Home / 21,658.47-29,890.43-17,218.86

Finding the Fourth Proportional to 21,658.47, 29,890.43 and 17,218.86

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Solution

The fourth proportional to 21,658.47, 29,890.43 and 17,218.86 is: 23,763.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,658.47 : 29,890.43 = 17,218.86 : x
  2. Step 2: Convert to fraction form
    21,658.47/29,890.43 = 17,218.86/x
  3. Step 3: Cross multiply
    21,658.47x = 29,890.43 × 17,218.86
  4. Step 4: Simplify right side
    21,658.47x = 514,679,043.42
  5. Step 5: Solve for x
    x = 514,679,043.42/21,658.47
  6. Step 6: Final answer
    x = 23,763.41

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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.