Home / 12,939.79-19,419.33-9,615.70

Finding the Fourth Proportional to 12,939.79, 19,419.33 and 9,615.70

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Solution

The fourth proportional to 12,939.79, 19,419.33 and 9,615.70 is: 14,430.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.79 : 19,419.33 = 9,615.70 : x
  2. Step 2: Convert to fraction form
    12,939.79/19,419.33 = 9,615.70/x
  3. Step 3: Cross multiply
    12,939.79x = 19,419.33 × 9,615.70
  4. Step 4: Simplify right side
    12,939.79x = 186,730,451.48
  5. Step 5: Solve for x
    x = 186,730,451.48/12,939.79
  6. Step 6: Final answer
    x = 14,430.72

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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.