Home / 12,938.90-19,416.35-5,146.90

Finding the Fourth Proportional to 12,938.90, 19,416.35 and 5,146.90

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Solution

The fourth proportional to 12,938.90, 19,416.35 and 5,146.90 is: 7,723.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.90 : 19,416.35 = 5,146.90 : x
  2. Step 2: Convert to fraction form
    12,938.90/19,416.35 = 5,146.90/x
  3. Step 3: Cross multiply
    12,938.90x = 19,416.35 × 5,146.90
  4. Step 4: Simplify right side
    12,938.90x = 99,934,011.82
  5. Step 5: Solve for x
    x = 99,934,011.82/12,938.90
  6. Step 6: Final answer
    x = 7,723.53

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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.