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Finding the Fourth Proportional to 14,980.10, 20,666.49 and 9,310.82

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Solution

The fourth proportional to 14,980.10, 20,666.49 and 9,310.82 is: 12,845.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,980.10 : 20,666.49 = 9,310.82 : x
  2. Step 2: Convert to fraction form
    14,980.10/20,666.49 = 9,310.82/x
  3. Step 3: Cross multiply
    14,980.10x = 20,666.49 × 9,310.82
  4. Step 4: Simplify right side
    14,980.10x = 192,421,968.42
  5. Step 5: Solve for x
    x = 192,421,968.42/14,980.10
  6. Step 6: Final answer
    x = 12,845.17

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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.