Home / 7,719.38-10,646.87-6,644.48

Finding the Fourth Proportional to 7,719.38, 10,646.87 and 6,644.48

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Solution

The fourth proportional to 7,719.38, 10,646.87 and 6,644.48 is: 9,164.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,719.38 : 10,646.87 = 6,644.48 : x
  2. Step 2: Convert to fraction form
    7,719.38/10,646.87 = 6,644.48/x
  3. Step 3: Cross multiply
    7,719.38x = 10,646.87 × 6,644.48
  4. Step 4: Simplify right side
    7,719.38x = 70,742,955.53
  5. Step 5: Solve for x
    x = 70,742,955.53/7,719.38
  6. Step 6: Final answer
    x = 9,164.33

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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.