Home / 20,840.34-28,759.59-11,409.06

Finding the Fourth Proportional to 20,840.34, 28,759.59 and 11,409.06

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Solution

The fourth proportional to 20,840.34, 28,759.59 and 11,409.06 is: 15,744.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.34 : 28,759.59 = 11,409.06 : x
  2. Step 2: Convert to fraction form
    20,840.34/28,759.59 = 11,409.06/x
  3. Step 3: Cross multiply
    20,840.34x = 28,759.59 × 11,409.06
  4. Step 4: Simplify right side
    20,840.34x = 328,119,887.89
  5. Step 5: Solve for x
    x = 328,119,887.89/20,840.34
  6. Step 6: Final answer
    x = 15,744.46

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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.