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Finding the Fourth Proportional to 27,266.40, 40,899.60 and 20,656.80

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Solution

The fourth proportional to 27,266.40, 40,899.60 and 20,656.80 is: 30,985.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,266.40 : 40,899.60 = 20,656.80 : x
  2. Step 2: Convert to fraction form
    27,266.40/40,899.60 = 20,656.80/x
  3. Step 3: Cross multiply
    27,266.40x = 40,899.60 × 20,656.80
  4. Step 4: Simplify right side
    27,266.40x = 844,854,857.28
  5. Step 5: Solve for x
    x = 844,854,857.28/27,266.40
  6. Step 6: Final answer
    x = 30,985.20

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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.