Home / 20,891.88-28,831.40-11,461.04

Finding the Fourth Proportional to 20,891.88, 28,831.40 and 11,461.04

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Solution

The fourth proportional to 20,891.88, 28,831.40 and 11,461.04 is: 15,816.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.88 : 28,831.40 = 11,461.04 : x
  2. Step 2: Convert to fraction form
    20,891.88/28,831.40 = 11,461.04/x
  3. Step 3: Cross multiply
    20,891.88x = 28,831.40 × 11,461.04
  4. Step 4: Simplify right side
    20,891.88x = 330,437,828.66
  5. Step 5: Solve for x
    x = 330,437,828.66/20,891.88
  6. Step 6: Final answer
    x = 15,816.57

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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.