Home / 13,720.36-18,934.04-7,751.72

Finding the Fourth Proportional to 13,720.36, 18,934.04 and 7,751.72

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Solution

The fourth proportional to 13,720.36, 18,934.04 and 7,751.72 is: 10,697.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.36 : 18,934.04 = 7,751.72 : x
  2. Step 2: Convert to fraction form
    13,720.36/18,934.04 = 7,751.72/x
  3. Step 3: Cross multiply
    13,720.36x = 18,934.04 × 7,751.72
  4. Step 4: Simplify right side
    13,720.36x = 146,771,376.55
  5. Step 5: Solve for x
    x = 146,771,376.55/13,720.36
  6. Step 6: Final answer
    x = 10,697.34

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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.