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Finding the Fourth Proportional to 15,045, 20,762.10 and 8,761.56

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Solution

The fourth proportional to 15,045, 20,762.10 and 8,761.56 is: 12,090.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,045 : 20,762.10 = 8,761.56 : x
  2. Step 2: Convert to fraction form
    15,045/20,762.10 = 8,761.56/x
  3. Step 3: Cross multiply
    15,045x = 20,762.10 × 8,761.56
  4. Step 4: Simplify right side
    15,045x = 181,908,384.88
  5. Step 5: Solve for x
    x = 181,908,384.88/15,045
  6. Step 6: Final answer
    x = 12,090.95

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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.