Home / 21,018.51-29,004.41-12,065.78

Finding the Fourth Proportional to 21,018.51, 29,004.41 and 12,065.78

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Solution

The fourth proportional to 21,018.51, 29,004.41 and 12,065.78 is: 16,650.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.51 : 29,004.41 = 12,065.78 : x
  2. Step 2: Convert to fraction form
    21,018.51/29,004.41 = 12,065.78/x
  3. Step 3: Cross multiply
    21,018.51x = 29,004.41 × 12,065.78
  4. Step 4: Simplify right side
    21,018.51x = 349,960,932.77
  5. Step 5: Solve for x
    x = 349,960,932.77/21,018.51
  6. Step 6: Final answer
    x = 16,650.13

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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.