Home / 20,938.00-28,898.99-12,878.58

Finding the Fourth Proportional to 20,938.00, 28,898.99 and 12,878.58

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Solution

The fourth proportional to 20,938.00, 28,898.99 and 12,878.58 is: 17,775.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.00 : 28,898.99 = 12,878.58 : x
  2. Step 2: Convert to fraction form
    20,938.00/28,898.99 = 12,878.58/x
  3. Step 3: Cross multiply
    20,938.00x = 28,898.99 × 12,878.58
  4. Step 4: Simplify right side
    20,938.00x = 372,177,810.14
  5. Step 5: Solve for x
    x = 372,177,810.14/20,938.00
  6. Step 6: Final answer
    x = 17,775.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.