Home / 42,653.75-63,980.57-18,955.78

Finding the Fourth Proportional to 42,653.75, 63,980.57 and 18,955.78

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Solution

The fourth proportional to 42,653.75, 63,980.57 and 18,955.78 is: 28,433.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,653.75 : 63,980.57 = 18,955.78 : x
  2. Step 2: Convert to fraction form
    42,653.75/63,980.57 = 18,955.78/x
  3. Step 3: Cross multiply
    42,653.75x = 63,980.57 × 18,955.78
  4. Step 4: Simplify right side
    42,653.75x = 1,212,801,649.92
  5. Step 5: Solve for x
    x = 1,212,801,649.92/42,653.75
  6. Step 6: Final answer
    x = 28,433.65

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1.5x scale

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.