Home / 20,929.83-28,888.14-11,982.50

Finding the Fourth Proportional to 20,929.83, 28,888.14 and 11,982.50

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Solution

The fourth proportional to 20,929.83, 28,888.14 and 11,982.50 is: 16,538.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.83 : 28,888.14 = 11,982.50 : x
  2. Step 2: Convert to fraction form
    20,929.83/28,888.14 = 11,982.50/x
  3. Step 3: Cross multiply
    20,929.83x = 28,888.14 × 11,982.50
  4. Step 4: Simplify right side
    20,929.83x = 346,152,137.55
  5. Step 5: Solve for x
    x = 346,152,137.55/20,929.83
  6. Step 6: Final answer
    x = 16,538.70

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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.