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Finding the Fourth Proportional to 12,641.40, 18,957.30 and 4,206.30

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Solution

The fourth proportional to 12,641.40, 18,957.30 and 4,206.30 is: 6,307.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,641.40 : 18,957.30 = 4,206.30 : x
  2. Step 2: Convert to fraction form
    12,641.40/18,957.30 = 4,206.30/x
  3. Step 3: Cross multiply
    12,641.40x = 18,957.30 × 4,206.30
  4. Step 4: Simplify right side
    12,641.40x = 79,740,090.99
  5. Step 5: Solve for x
    x = 79,740,090.99/12,641.40
  6. Step 6: Final answer
    x = 6,307.85

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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.