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Finding the Fourth Proportional to 17,720.40, 26,580.60 and 12,836.10

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Solution

The fourth proportional to 17,720.40, 26,580.60 and 12,836.10 is: 19,254.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,720.40 : 26,580.60 = 12,836.10 : x
  2. Step 2: Convert to fraction form
    17,720.40/26,580.60 = 12,836.10/x
  3. Step 3: Cross multiply
    17,720.40x = 26,580.60 × 12,836.10
  4. Step 4: Simplify right side
    17,720.40x = 341,191,239.66
  5. Step 5: Solve for x
    x = 341,191,239.66/17,720.40
  6. Step 6: Final answer
    x = 19,254.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.