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Finding the Fourth Proportional to 13,333.80, 20,000.70 and 12,210.60

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Solution

The fourth proportional to 13,333.80, 20,000.70 and 12,210.60 is: 18,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,333.80 : 20,000.70 = 12,210.60 : x
  2. Step 2: Convert to fraction form
    13,333.80/20,000.70 = 12,210.60/x
  3. Step 3: Cross multiply
    13,333.80x = 20,000.70 × 12,210.60
  4. Step 4: Simplify right side
    13,333.80x = 244,220,547.42
  5. Step 5: Solve for x
    x = 244,220,547.42/13,333.80
  6. Step 6: Final answer
    x = 18,315.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.