Home / 25,435.10-38,125.65-12,278.90

Finding the Fourth Proportional to 25,435.10, 38,125.65 and 12,278.90

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Solution

The fourth proportional to 25,435.10, 38,125.65 and 12,278.90 is: 18,405.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,435.10 : 38,125.65 = 12,278.90 : x
  2. Step 2: Convert to fraction form
    25,435.10/38,125.65 = 12,278.90/x
  3. Step 3: Cross multiply
    25,435.10x = 38,125.65 × 12,278.90
  4. Step 4: Simplify right side
    25,435.10x = 468,141,043.79
  5. Step 5: Solve for x
    x = 468,141,043.79/25,435.10
  6. Step 6: Final answer
    x = 18,405.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.