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Finding the Fourth Proportional to 30,123.65, 45,187.67 and 7,936.88

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Solution

The fourth proportional to 30,123.65, 45,187.67 and 7,936.88 is: 11,905.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,123.65 : 45,187.67 = 7,936.88 : x
  2. Step 2: Convert to fraction form
    30,123.65/45,187.67 = 7,936.88/x
  3. Step 3: Cross multiply
    30,123.65x = 45,187.67 × 7,936.88
  4. Step 4: Simplify right side
    30,123.65x = 358,648,908.17
  5. Step 5: Solve for x
    x = 358,648,908.17/30,123.65
  6. Step 6: Final answer
    x = 11,905.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.