Home / 30,139.81-45,204.54-7,953.40

Finding the Fourth Proportional to 30,139.81, 45,204.54 and 7,953.40

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Solution

The fourth proportional to 30,139.81, 45,204.54 and 7,953.40 is: 11,928.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,139.81 : 45,204.54 = 7,953.40 : x
  2. Step 2: Convert to fraction form
    30,139.81/45,204.54 = 7,953.40/x
  3. Step 3: Cross multiply
    30,139.81x = 45,204.54 × 7,953.40
  4. Step 4: Simplify right side
    30,139.81x = 359,529,788.44
  5. Step 5: Solve for x
    x = 359,529,788.44/30,139.81
  6. Step 6: Final answer
    x = 11,928.73

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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.