Home / 20,740.89-31,111.47-5,158.65

Finding the Fourth Proportional to 20,740.89, 31,111.47 and 5,158.65

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Solution

The fourth proportional to 20,740.89, 31,111.47 and 5,158.65 is: 7,738.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.89 : 31,111.47 = 5,158.65 : x
  2. Step 2: Convert to fraction form
    20,740.89/31,111.47 = 5,158.65/x
  3. Step 3: Cross multiply
    20,740.89x = 31,111.47 × 5,158.65
  4. Step 4: Simplify right side
    20,740.89x = 160,493,184.72
  5. Step 5: Solve for x
    x = 160,493,184.72/20,740.89
  6. Step 6: Final answer
    x = 7,738.01

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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.