Home / 6,990.02-9,646.90-5,218.55

Finding the Fourth Proportional to 6,990.02, 9,646.90 and 5,218.55

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Solution

The fourth proportional to 6,990.02, 9,646.90 and 5,218.55 is: 7,202.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.02 : 9,646.90 = 5,218.55 : x
  2. Step 2: Convert to fraction form
    6,990.02/9,646.90 = 5,218.55/x
  3. Step 3: Cross multiply
    6,990.02x = 9,646.90 × 5,218.55
  4. Step 4: Simplify right side
    6,990.02x = 50,342,794.81
  5. Step 5: Solve for x
    x = 50,342,794.81/6,990.02
  6. Step 6: Final answer
    x = 7,202.10

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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.