Home / 30,289.40-45,428.70-19,176.20

Finding the Fourth Proportional to 30,289.40, 45,428.70 and 19,176.20

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Solution

The fourth proportional to 30,289.40, 45,428.70 and 19,176.20 is: 28,760.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,289.40 : 45,428.70 = 19,176.20 : x
  2. Step 2: Convert to fraction form
    30,289.40/45,428.70 = 19,176.20/x
  3. Step 3: Cross multiply
    30,289.40x = 45,428.70 × 19,176.20
  4. Step 4: Simplify right side
    30,289.40x = 871,149,836.94
  5. Step 5: Solve for x
    x = 871,149,836.94/30,289.40
  6. Step 6: Final answer
    x = 28,760.88

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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.