Home / 12,938.45-17,854.07-7,905.11

Finding the Fourth Proportional to 12,938.45, 17,854.07 and 7,905.11

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Solution

The fourth proportional to 12,938.45, 17,854.07 and 7,905.11 is: 10,908.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.45 : 17,854.07 = 7,905.11 : x
  2. Step 2: Convert to fraction form
    12,938.45/17,854.07 = 7,905.11/x
  3. Step 3: Cross multiply
    12,938.45x = 17,854.07 × 7,905.11
  4. Step 4: Simplify right side
    12,938.45x = 141,138,451.70
  5. Step 5: Solve for x
    x = 141,138,451.70/12,938.45
  6. Step 6: Final answer
    x = 10,908.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.