Home / 20,971.50-28,941.48-11,539.86

Finding the Fourth Proportional to 20,971.50, 28,941.48 and 11,539.86

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Solution

The fourth proportional to 20,971.50, 28,941.48 and 11,539.86 is: 15,925.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.50 : 28,941.48 = 11,539.86 : x
  2. Step 2: Convert to fraction form
    20,971.50/28,941.48 = 11,539.86/x
  3. Step 3: Cross multiply
    20,971.50x = 28,941.48 × 11,539.86
  4. Step 4: Simplify right side
    20,971.50x = 333,980,627.39
  5. Step 5: Solve for x
    x = 333,980,627.39/20,971.50
  6. Step 6: Final answer
    x = 15,925.45

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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.