Home / 30,128.75-45,208.89-21,876.93

Finding the Fourth Proportional to 30,128.75, 45,208.89 and 21,876.93

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Solution

The fourth proportional to 30,128.75, 45,208.89 and 21,876.93 is: 32,826.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,128.75 : 45,208.89 = 21,876.93 : x
  2. Step 2: Convert to fraction form
    30,128.75/45,208.89 = 21,876.93/x
  3. Step 3: Cross multiply
    30,128.75x = 45,208.89 × 21,876.93
  4. Step 4: Simplify right side
    30,128.75x = 989,031,721.91
  5. Step 5: Solve for x
    x = 989,031,721.91/30,128.75
  6. Step 6: Final answer
    x = 32,826.84

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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.