Home / 13,421.84-18,523.76-8,117.15

Finding the Fourth Proportional to 13,421.84, 18,523.76 and 8,117.15

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Solution

The fourth proportional to 13,421.84, 18,523.76 and 8,117.15 is: 11,202.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.84 : 18,523.76 = 8,117.15 : x
  2. Step 2: Convert to fraction form
    13,421.84/18,523.76 = 8,117.15/x
  3. Step 3: Cross multiply
    13,421.84x = 18,523.76 × 8,117.15
  4. Step 4: Simplify right side
    13,421.84x = 150,360,005.28
  5. Step 5: Solve for x
    x = 150,360,005.28/13,421.84
  6. Step 6: Final answer
    x = 11,202.64

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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.