Home / 42,912.75-64,378.86-15,210.75

Finding the Fourth Proportional to 42,912.75, 64,378.86 and 15,210.75

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Solution

The fourth proportional to 42,912.75, 64,378.86 and 15,210.75 is: 22,819.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,912.75 : 64,378.86 = 15,210.75 : x
  2. Step 2: Convert to fraction form
    42,912.75/64,378.86 = 15,210.75/x
  3. Step 3: Cross multiply
    42,912.75x = 64,378.86 × 15,210.75
  4. Step 4: Simplify right side
    42,912.75x = 979,250,744.75
  5. Step 5: Solve for x
    x = 979,250,744.75/42,912.75
  6. Step 6: Final answer
    x = 22,819.58

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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.