Home / 20,989.50-28,968.14-12,036.84

Finding the Fourth Proportional to 20,989.50, 28,968.14 and 12,036.84

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Solution

The fourth proportional to 20,989.50, 28,968.14 and 12,036.84 is: 16,612.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.50 : 28,968.14 = 12,036.84 : x
  2. Step 2: Convert to fraction form
    20,989.50/28,968.14 = 12,036.84/x
  3. Step 3: Cross multiply
    20,989.50x = 28,968.14 × 12,036.84
  4. Step 4: Simplify right side
    20,989.50x = 348,684,866.28
  5. Step 5: Solve for x
    x = 348,684,866.28/20,989.50
  6. Step 6: Final answer
    x = 16,612.35

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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.