Home / 45,333.10-68,021.93-20,390.78

Finding the Fourth Proportional to 45,333.10, 68,021.93 and 20,390.78

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Solution

The fourth proportional to 45,333.10, 68,021.93 and 20,390.78 is: 30,596.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,333.10 : 68,021.93 = 20,390.78 : x
  2. Step 2: Convert to fraction form
    45,333.10/68,021.93 = 20,390.78/x
  3. Step 3: Cross multiply
    45,333.10x = 68,021.93 × 20,390.78
  4. Step 4: Simplify right side
    45,333.10x = 1,387,020,209.81
  5. Step 5: Solve for x
    x = 1,387,020,209.81/45,333.10
  6. Step 6: Final answer
    x = 30,596.19

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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.