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Finding the Fourth Proportional to 26,731.40, 40,250.75 and 20,587.40

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Solution

The fourth proportional to 26,731.40, 40,250.75 and 20,587.40 is: 30,999.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,731.40 : 40,250.75 = 20,587.40 : x
  2. Step 2: Convert to fraction form
    26,731.40/40,250.75 = 20,587.40/x
  3. Step 3: Cross multiply
    26,731.40x = 40,250.75 × 20,587.40
  4. Step 4: Simplify right side
    26,731.40x = 828,658,290.55
  5. Step 5: Solve for x
    x = 828,658,290.55/26,731.40
  6. Step 6: Final answer
    x = 30,999.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.