Home / 20,989.88-28,970.00-12,043.23

Finding the Fourth Proportional to 20,989.88, 28,970.00 and 12,043.23

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Solution

The fourth proportional to 20,989.88, 28,970.00 and 12,043.23 is: 16,621.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.88 : 28,970.00 = 12,043.23 : x
  2. Step 2: Convert to fraction form
    20,989.88/28,970.00 = 12,043.23/x
  3. Step 3: Cross multiply
    20,989.88x = 28,970.00 × 12,043.23
  4. Step 4: Simplify right side
    20,989.88x = 348,892,480.11
  5. Step 5: Solve for x
    x = 348,892,480.11/20,989.88
  6. Step 6: Final answer
    x = 16,621.93

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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.