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Finding the Fourth Proportional to 12,318.85, 17,000.18 and 7,013.69

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Solution

The fourth proportional to 12,318.85, 17,000.18 and 7,013.69 is: 9,678.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.85 : 17,000.18 = 7,013.69 : x
  2. Step 2: Convert to fraction form
    12,318.85/17,000.18 = 7,013.69/x
  3. Step 3: Cross multiply
    12,318.85x = 17,000.18 × 7,013.69
  4. Step 4: Simplify right side
    12,318.85x = 119,233,962.45
  5. Step 5: Solve for x
    x = 119,233,962.45/12,318.85
  6. Step 6: Final answer
    x = 9,678.98

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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.