Home / 20,339.80-28,069.98-11,386.77

Finding the Fourth Proportional to 20,339.80, 28,069.98 and 11,386.77

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Solution

The fourth proportional to 20,339.80, 28,069.98 and 11,386.77 is: 15,714.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,339.80 : 28,069.98 = 11,386.77 : x
  2. Step 2: Convert to fraction form
    20,339.80/28,069.98 = 11,386.77/x
  3. Step 3: Cross multiply
    20,339.80x = 28,069.98 × 11,386.77
  4. Step 4: Simplify right side
    20,339.80x = 319,626,258.20
  5. Step 5: Solve for x
    x = 319,626,258.20/20,339.80
  6. Step 6: Final answer
    x = 15,714.33

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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.