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Finding the Fourth Proportional to 16,251.51, 22,405.40 and 12,905.40

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Solution

The fourth proportional to 16,251.51, 22,405.40 and 12,905.40 is: 17,792.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,251.51 : 22,405.40 = 12,905.40 : x
  2. Step 2: Convert to fraction form
    16,251.51/22,405.40 = 12,905.40/x
  3. Step 3: Cross multiply
    16,251.51x = 22,405.40 × 12,905.40
  4. Step 4: Simplify right side
    16,251.51x = 289,150,649.16
  5. Step 5: Solve for x
    x = 289,150,649.16/16,251.51
  6. Step 6: Final answer
    x = 17,792.23

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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.