Home / 13,719.78-18,913.91-9,739.44

Finding the Fourth Proportional to 13,719.78, 18,913.91 and 9,739.44

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Solution

The fourth proportional to 13,719.78, 18,913.91 and 9,739.44 is: 13,426.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.78 : 18,913.91 = 9,739.44 : x
  2. Step 2: Convert to fraction form
    13,719.78/18,913.91 = 9,739.44/x
  3. Step 3: Cross multiply
    13,719.78x = 18,913.91 × 9,739.44
  4. Step 4: Simplify right side
    13,719.78x = 184,210,842.91
  5. Step 5: Solve for x
    x = 184,210,842.91/13,719.78
  6. Step 6: Final answer
    x = 13,426.66

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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.