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Finding the Fourth Proportional to 26,307.76, 36,305.78 and 15,129.76

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Solution

The fourth proportional to 26,307.76, 36,305.78 and 15,129.76 is: 20,879.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,307.76 : 36,305.78 = 15,129.76 : x
  2. Step 2: Convert to fraction form
    26,307.76/36,305.78 = 15,129.76/x
  3. Step 3: Cross multiply
    26,307.76x = 36,305.78 × 15,129.76
  4. Step 4: Simplify right side
    26,307.76x = 549,297,738.01
  5. Step 5: Solve for x
    x = 549,297,738.01/26,307.76
  6. Step 6: Final answer
    x = 20,879.68

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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.