Home / 20,938.40-28,894.48-11,985.32

Finding the Fourth Proportional to 20,938.40, 28,894.48 and 11,985.32

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Solution

The fourth proportional to 20,938.40, 28,894.48 and 11,985.32 is: 16,539.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.40 : 28,894.48 = 11,985.32 : x
  2. Step 2: Convert to fraction form
    20,938.40/28,894.48 = 11,985.32/x
  3. Step 3: Cross multiply
    20,938.40x = 28,894.48 × 11,985.32
  4. Step 4: Simplify right side
    20,938.40x = 346,309,589.03
  5. Step 5: Solve for x
    x = 346,309,589.03/20,938.40
  6. Step 6: Final answer
    x = 16,539.45

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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.