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Finding the Fourth Proportional to 18,819.12, 25,970.40 and 10,435.68

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Solution

The fourth proportional to 18,819.12, 25,970.40 and 10,435.68 is: 14,401.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.12 : 25,970.40 = 10,435.68 : x
  2. Step 2: Convert to fraction form
    18,819.12/25,970.40 = 10,435.68/x
  3. Step 3: Cross multiply
    18,819.12x = 25,970.40 × 10,435.68
  4. Step 4: Simplify right side
    18,819.12x = 271,018,783.87
  5. Step 5: Solve for x
    x = 271,018,783.87/18,819.12
  6. Step 6: Final answer
    x = 14,401.25

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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.