Home / 12,938.16-19,403.16-4,171.20

Finding the Fourth Proportional to 12,938.16, 19,403.16 and 4,171.20

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Solution

The fourth proportional to 12,938.16, 19,403.16 and 4,171.20 is: 6,255.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.16 : 19,403.16 = 4,171.20 : x
  2. Step 2: Convert to fraction form
    12,938.16/19,403.16 = 4,171.20/x
  3. Step 3: Cross multiply
    12,938.16x = 19,403.16 × 4,171.20
  4. Step 4: Simplify right side
    12,938.16x = 80,934,460.99
  5. Step 5: Solve for x
    x = 80,934,460.99/12,938.16
  6. Step 6: Final answer
    x = 6,255.48

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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.