Home / 45,289.83-67,912.91-18,987.51

Finding the Fourth Proportional to 45,289.83, 67,912.91 and 18,987.51

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Solution

The fourth proportional to 45,289.83, 67,912.91 and 18,987.51 is: 28,472.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,289.83 : 67,912.91 = 18,987.51 : x
  2. Step 2: Convert to fraction form
    45,289.83/67,912.91 = 18,987.51/x
  3. Step 3: Cross multiply
    45,289.83x = 67,912.91 × 18,987.51
  4. Step 4: Simplify right side
    45,289.83x = 1,289,496,962.82
  5. Step 5: Solve for x
    x = 1,289,496,962.82/45,289.83
  6. Step 6: Final answer
    x = 28,472.11

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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.