Home / 20,840.51-28,759.90-11,409.07

Finding the Fourth Proportional to 20,840.51, 28,759.90 and 11,409.07

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Solution

The fourth proportional to 20,840.51, 28,759.90 and 11,409.07 is: 15,744.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.51 : 28,759.90 = 11,409.07 : x
  2. Step 2: Convert to fraction form
    20,840.51/28,759.90 = 11,409.07/x
  3. Step 3: Cross multiply
    20,840.51x = 28,759.90 × 11,409.07
  4. Step 4: Simplify right side
    20,840.51x = 328,123,762.50
  5. Step 5: Solve for x
    x = 328,123,762.50/20,840.51
  6. Step 6: Final answer
    x = 15,744.52

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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.