Home / 13,775.40-19,010.20-7,487.78

Finding the Fourth Proportional to 13,775.40, 19,010.20 and 7,487.78

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Solution

The fourth proportional to 13,775.40, 19,010.20 and 7,487.78 is: 10,333.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,775.40 : 19,010.20 = 7,487.78 : x
  2. Step 2: Convert to fraction form
    13,775.40/19,010.20 = 7,487.78/x
  3. Step 3: Cross multiply
    13,775.40x = 19,010.20 × 7,487.78
  4. Step 4: Simplify right side
    13,775.40x = 142,344,195.36
  5. Step 5: Solve for x
    x = 142,344,195.36/13,775.40
  6. Step 6: Final answer
    x = 10,333.22

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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.