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Finding the Fourth Proportional to 12,767.85, 19,130.88 and 12,281.85

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Solution

The fourth proportional to 12,767.85, 19,130.88 and 12,281.85 is: 18,402.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,767.85 : 19,130.88 = 12,281.85 : x
  2. Step 2: Convert to fraction form
    12,767.85/19,130.88 = 12,281.85/x
  3. Step 3: Cross multiply
    12,767.85x = 19,130.88 × 12,281.85
  4. Step 4: Simplify right side
    12,767.85x = 234,962,598.53
  5. Step 5: Solve for x
    x = 234,962,598.53/12,767.85
  6. Step 6: Final answer
    x = 18,402.68

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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.