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Finding the Fourth Proportional to 17,780.40, 26,670.60 and 12,884.40

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Solution

The fourth proportional to 17,780.40, 26,670.60 and 12,884.40 is: 19,326.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,780.40 : 26,670.60 = 12,884.40 : x
  2. Step 2: Convert to fraction form
    17,780.40/26,670.60 = 12,884.40/x
  3. Step 3: Cross multiply
    17,780.40x = 26,670.60 × 12,884.40
  4. Step 4: Simplify right side
    17,780.40x = 343,634,678.64
  5. Step 5: Solve for x
    x = 343,634,678.64/17,780.40
  6. Step 6: Final answer
    x = 19,326.60

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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.