Home / 20,671.71-28,525.75-11,240.19

Finding the Fourth Proportional to 20,671.71, 28,525.75 and 11,240.19

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Solution

The fourth proportional to 20,671.71, 28,525.75 and 11,240.19 is: 15,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,671.71 : 28,525.75 = 11,240.19 : x
  2. Step 2: Convert to fraction form
    20,671.71/28,525.75 = 11,240.19/x
  3. Step 3: Cross multiply
    20,671.71x = 28,525.75 × 11,240.19
  4. Step 4: Simplify right side
    20,671.71x = 320,634,849.89
  5. Step 5: Solve for x
    x = 320,634,849.89/20,671.71
  6. Step 6: Final answer
    x = 15,510.80

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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.