Home / 45,752.40-68,628.60-21,128.40

Finding the Fourth Proportional to 45,752.40, 68,628.60 and 21,128.40

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Solution

The fourth proportional to 45,752.40, 68,628.60 and 21,128.40 is: 31,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,752.40 : 68,628.60 = 21,128.40 : x
  2. Step 2: Convert to fraction form
    45,752.40/68,628.60 = 21,128.40/x
  3. Step 3: Cross multiply
    45,752.40x = 68,628.60 × 21,128.40
  4. Step 4: Simplify right side
    45,752.40x = 1,450,012,512.24
  5. Step 5: Solve for x
    x = 1,450,012,512.24/45,752.40
  6. Step 6: Final answer
    x = 31,692.60

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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.