Home / 19,915.20-29,887.20-11,140.80

Finding the Fourth Proportional to 19,915.20, 29,887.20 and 11,140.80

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Solution

The fourth proportional to 19,915.20, 29,887.20 and 11,140.80 is: 16,719.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,915.20 : 29,887.20 = 11,140.80 : x
  2. Step 2: Convert to fraction form
    19,915.20/29,887.20 = 11,140.80/x
  3. Step 3: Cross multiply
    19,915.20x = 29,887.20 × 11,140.80
  4. Step 4: Simplify right side
    19,915.20x = 332,967,317.76
  5. Step 5: Solve for x
    x = 332,967,317.76/19,915.20
  6. Step 6: Final answer
    x = 16,719.26

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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.