Home / 20,772.40-28,664.70-11,339.08

Finding the Fourth Proportional to 20,772.40, 28,664.70 and 11,339.08

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Solution

The fourth proportional to 20,772.40, 28,664.70 and 11,339.08 is: 15,647.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.40 : 28,664.70 = 11,339.08 : x
  2. Step 2: Convert to fraction form
    20,772.40/28,664.70 = 11,339.08/x
  3. Step 3: Cross multiply
    20,772.40x = 28,664.70 × 11,339.08
  4. Step 4: Simplify right side
    20,772.40x = 325,031,326.48
  5. Step 5: Solve for x
    x = 325,031,326.48/20,772.40
  6. Step 6: Final answer
    x = 15,647.27

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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.