Home / 13,520.51-18,671.13-12,784.22

Finding the Fourth Proportional to 13,520.51, 18,671.13 and 12,784.22

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Solution

The fourth proportional to 13,520.51, 18,671.13 and 12,784.22 is: 17,654.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.51 : 18,671.13 = 12,784.22 : x
  2. Step 2: Convert to fraction form
    13,520.51/18,671.13 = 12,784.22/x
  3. Step 3: Cross multiply
    13,520.51x = 18,671.13 × 12,784.22
  4. Step 4: Simplify right side
    13,520.51x = 238,695,833.57
  5. Step 5: Solve for x
    x = 238,695,833.57/13,520.51
  6. Step 6: Final answer
    x = 17,654.35

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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.