Home / 7,709.19-10,638.69-4,172.40

Finding the Fourth Proportional to 7,709.19, 10,638.69 and 4,172.40

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Solution

The fourth proportional to 7,709.19, 10,638.69 and 4,172.40 is: 5,757.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,709.19 : 10,638.69 = 4,172.40 : x
  2. Step 2: Convert to fraction form
    7,709.19/10,638.69 = 4,172.40/x
  3. Step 3: Cross multiply
    7,709.19x = 10,638.69 × 4,172.40
  4. Step 4: Simplify right side
    7,709.19x = 44,388,870.16
  5. Step 5: Solve for x
    x = 44,388,870.16/7,709.19
  6. Step 6: Final answer
    x = 5,757.92

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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.