Home / 13,281.53-18,319.03-8,561.25

Finding the Fourth Proportional to 13,281.53, 18,319.03 and 8,561.25

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Solution

The fourth proportional to 13,281.53, 18,319.03 and 8,561.25 is: 11,808.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.53 : 18,319.03 = 8,561.25 : x
  2. Step 2: Convert to fraction form
    13,281.53/18,319.03 = 8,561.25/x
  3. Step 3: Cross multiply
    13,281.53x = 18,319.03 × 8,561.25
  4. Step 4: Simplify right side
    13,281.53x = 156,833,774.18
  5. Step 5: Solve for x
    x = 156,833,774.18/13,281.53
  6. Step 6: Final answer
    x = 11,808.42

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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.