Home / 13,520.55-18,671.13-12,784.26

Finding the Fourth Proportional to 13,520.55, 18,671.13 and 12,784.26

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Solution

The fourth proportional to 13,520.55, 18,671.13 and 12,784.26 is: 17,654.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.55 : 18,671.13 = 12,784.26 : x
  2. Step 2: Convert to fraction form
    13,520.55/18,671.13 = 12,784.26/x
  3. Step 3: Cross multiply
    13,520.55x = 18,671.13 × 12,784.26
  4. Step 4: Simplify right side
    13,520.55x = 238,696,580.41
  5. Step 5: Solve for x
    x = 238,696,580.41/13,520.55
  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.