Home / 12,963.20-19,459.20-8,038.40

Finding the Fourth Proportional to 12,963.20, 19,459.20 and 8,038.40

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Solution

The fourth proportional to 12,963.20, 19,459.20 and 8,038.40 is: 12,066.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,963.20 : 19,459.20 = 8,038.40 : x
  2. Step 2: Convert to fraction form
    12,963.20/19,459.20 = 8,038.40/x
  3. Step 3: Cross multiply
    12,963.20x = 19,459.20 × 8,038.40
  4. Step 4: Simplify right side
    12,963.20x = 156,420,833.28
  5. Step 5: Solve for x
    x = 156,420,833.28/12,963.20
  6. Step 6: Final answer
    x = 12,066.53

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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.