Home / 30,123.60-45,185.85-7,939.23

Finding the Fourth Proportional to 30,123.60, 45,185.85 and 7,939.23

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Solution

The fourth proportional to 30,123.60, 45,185.85 and 7,939.23 is: 11,908.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,123.60 : 45,185.85 = 7,939.23 : x
  2. Step 2: Convert to fraction form
    30,123.60/45,185.85 = 7,939.23/x
  3. Step 3: Cross multiply
    30,123.60x = 45,185.85 × 7,939.23
  4. Step 4: Simplify right side
    30,123.60x = 358,740,855.90
  5. Step 5: Solve for x
    x = 358,740,855.90/30,123.60
  6. Step 6: Final answer
    x = 11,908.96

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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.