Home / 13,315.48-18,372.08-8,140.05

Finding the Fourth Proportional to 13,315.48, 18,372.08 and 8,140.05

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Solution

The fourth proportional to 13,315.48, 18,372.08 and 8,140.05 is: 11,231.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.48 : 18,372.08 = 8,140.05 : x
  2. Step 2: Convert to fraction form
    13,315.48/18,372.08 = 8,140.05/x
  3. Step 3: Cross multiply
    13,315.48x = 18,372.08 × 8,140.05
  4. Step 4: Simplify right side
    13,315.48x = 149,549,578.29
  5. Step 5: Solve for x
    x = 149,549,578.29/13,315.48
  6. Step 6: Final answer
    x = 11,231.26

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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.