Home / 20,989.18-28,964.70-12,036.16

Finding the Fourth Proportional to 20,989.18, 28,964.70 and 12,036.16

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Solution

The fourth proportional to 20,989.18, 28,964.70 and 12,036.16 is: 16,609.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.18 : 28,964.70 = 12,036.16 : x
  2. Step 2: Convert to fraction form
    20,989.18/28,964.70 = 12,036.16/x
  3. Step 3: Cross multiply
    20,989.18x = 28,964.70 × 12,036.16
  4. Step 4: Simplify right side
    20,989.18x = 348,623,763.55
  5. Step 5: Solve for x
    x = 348,623,763.55/20,989.18
  6. Step 6: Final answer
    x = 16,609.69

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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.