Home / 21,147.47-29,183.51-12,649.95

Finding the Fourth Proportional to 21,147.47, 29,183.51 and 12,649.95

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Solution

The fourth proportional to 21,147.47, 29,183.51 and 12,649.95 is: 17,456.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.47 : 29,183.51 = 12,649.95 : x
  2. Step 2: Convert to fraction form
    21,147.47/29,183.51 = 12,649.95/x
  3. Step 3: Cross multiply
    21,147.47x = 29,183.51 × 12,649.95
  4. Step 4: Simplify right side
    21,147.47x = 369,169,950.70
  5. Step 5: Solve for x
    x = 369,169,950.70/21,147.47
  6. Step 6: Final answer
    x = 17,456.93

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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.