Home / 3,990.53-5,501.23-2,807.93

Finding the Fourth Proportional to 3,990.53, 5,501.23 and 2,807.93

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Solution

The fourth proportional to 3,990.53, 5,501.23 and 2,807.93 is: 3,870.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.53 : 5,501.23 = 2,807.93 : x
  2. Step 2: Convert to fraction form
    3,990.53/5,501.23 = 2,807.93/x
  3. Step 3: Cross multiply
    3,990.53x = 5,501.23 × 2,807.93
  4. Step 4: Simplify right side
    3,990.53x = 15,447,054.71
  5. Step 5: Solve for x
    x = 15,447,054.71/3,990.53
  6. Step 6: Final answer
    x = 3,870.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.