Home / 13,836.21-20,646.40-12,345.18

Finding the Fourth Proportional to 13,836.21, 20,646.40 and 12,345.18

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Solution

The fourth proportional to 13,836.21, 20,646.40 and 12,345.18 is: 18,421.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,836.21 : 20,646.40 = 12,345.18 : x
  2. Step 2: Convert to fraction form
    13,836.21/20,646.40 = 12,345.18/x
  3. Step 3: Cross multiply
    13,836.21x = 20,646.40 × 12,345.18
  4. Step 4: Simplify right side
    13,836.21x = 254,883,524.35
  5. Step 5: Solve for x
    x = 254,883,524.35/13,836.21
  6. Step 6: Final answer
    x = 18,421.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.