Home / 20,990.58-28,966.50-12,043.32

Finding the Fourth Proportional to 20,990.58, 28,966.50 and 12,043.32

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Solution

The fourth proportional to 20,990.58, 28,966.50 and 12,043.32 is: 16,619.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.58 : 28,966.50 = 12,043.32 : x
  2. Step 2: Convert to fraction form
    20,990.58/28,966.50 = 12,043.32/x
  3. Step 3: Cross multiply
    20,990.58x = 28,966.50 × 12,043.32
  4. Step 4: Simplify right side
    20,990.58x = 348,852,828.78
  5. Step 5: Solve for x
    x = 348,852,828.78/20,990.58
  6. Step 6: Final answer
    x = 16,619.49

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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.