Home / 13,508.78-18,643.26-7,539.68

Finding the Fourth Proportional to 13,508.78, 18,643.26 and 7,539.68

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Solution

The fourth proportional to 13,508.78, 18,643.26 and 7,539.68 is: 10,405.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,508.78 : 18,643.26 = 7,539.68 : x
  2. Step 2: Convert to fraction form
    13,508.78/18,643.26 = 7,539.68/x
  3. Step 3: Cross multiply
    13,508.78x = 18,643.26 × 7,539.68
  4. Step 4: Simplify right side
    13,508.78x = 140,564,214.56
  5. Step 5: Solve for x
    x = 140,564,214.56/13,508.78
  6. Step 6: Final answer
    x = 10,405.40

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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.