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Finding the Fourth Proportional to 13,360.01, 18,378.09 and 12,820.55

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Solution

The fourth proportional to 13,360.01, 18,378.09 and 12,820.55 is: 17,636.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,360.01 : 18,378.09 = 12,820.55 : x
  2. Step 2: Convert to fraction form
    13,360.01/18,378.09 = 12,820.55/x
  3. Step 3: Cross multiply
    13,360.01x = 18,378.09 × 12,820.55
  4. Step 4: Simplify right side
    13,360.01x = 235,617,129.86
  5. Step 5: Solve for x
    x = 235,617,129.86/13,360.01
  6. Step 6: Final answer
    x = 17,636.01

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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.