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Finding the Fourth Proportional to 12,666.70, 19,000.05 and 6,820.30

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Solution

The fourth proportional to 12,666.70, 19,000.05 and 6,820.30 is: 10,230.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.70 : 19,000.05 = 6,820.30 : x
  2. Step 2: Convert to fraction form
    12,666.70/19,000.05 = 6,820.30/x
  3. Step 3: Cross multiply
    12,666.70x = 19,000.05 × 6,820.30
  4. Step 4: Simplify right side
    12,666.70x = 129,586,041.02
  5. Step 5: Solve for x
    x = 129,586,041.02/12,666.70
  6. Step 6: Final answer
    x = 10,230.45

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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.