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Finding the Fourth Proportional to 30,123.89, 45,182.40 and 7,939.01

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Solution

The fourth proportional to 30,123.89, 45,182.40 and 7,939.01 is: 11,907.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,123.89 : 45,182.40 = 7,939.01 : x
  2. Step 2: Convert to fraction form
    30,123.89/45,182.40 = 7,939.01/x
  3. Step 3: Cross multiply
    30,123.89x = 45,182.40 × 7,939.01
  4. Step 4: Simplify right side
    30,123.89x = 358,703,299.51
  5. Step 5: Solve for x
    x = 358,703,299.51/30,123.89
  6. Step 6: Final answer
    x = 11,907.60

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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.