Home / 20,938.06-28,893.36-11,985.13

Finding the Fourth Proportional to 20,938.06, 28,893.36 and 11,985.13

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Solution

The fourth proportional to 20,938.06, 28,893.36 and 11,985.13 is: 16,538.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.06 : 28,893.36 = 11,985.13 : x
  2. Step 2: Convert to fraction form
    20,938.06/28,893.36 = 11,985.13/x
  3. Step 3: Cross multiply
    20,938.06x = 28,893.36 × 11,985.13
  4. Step 4: Simplify right side
    20,938.06x = 346,290,675.74
  5. Step 5: Solve for x
    x = 346,290,675.74/20,938.06
  6. Step 6: Final answer
    x = 16,538.81

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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.