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Finding the Fourth Proportional to 14,985.05, 20,678.84 and 8,270.20

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Solution

The fourth proportional to 14,985.05, 20,678.84 and 8,270.20 is: 11,412.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,985.05 : 20,678.84 = 8,270.20 : x
  2. Step 2: Convert to fraction form
    14,985.05/20,678.84 = 8,270.20/x
  3. Step 3: Cross multiply
    14,985.05x = 20,678.84 × 8,270.20
  4. Step 4: Simplify right side
    14,985.05x = 171,018,204.60
  5. Step 5: Solve for x
    x = 171,018,204.60/14,985.05
  6. Step 6: Final answer
    x = 11,412.59

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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.