Home / 42,128.17-63,161.07-19,915.61

Finding the Fourth Proportional to 42,128.17, 63,161.07 and 19,915.61

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Solution

The fourth proportional to 42,128.17, 63,161.07 and 19,915.61 is: 29,858.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,128.17 : 63,161.07 = 19,915.61 : x
  2. Step 2: Convert to fraction form
    42,128.17/63,161.07 = 19,915.61/x
  3. Step 3: Cross multiply
    42,128.17x = 63,161.07 × 19,915.61
  4. Step 4: Simplify right side
    42,128.17x = 1,257,891,237.30
  5. Step 5: Solve for x
    x = 1,257,891,237.30/42,128.17
  6. Step 6: Final answer
    x = 29,858.67

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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.