Home / 12,938.24-17,855.16-7,903.28

Finding the Fourth Proportional to 12,938.24, 17,855.16 and 7,903.28

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Solution

The fourth proportional to 12,938.24, 17,855.16 and 7,903.28 is: 10,906.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.24 : 17,855.16 = 7,903.28 : x
  2. Step 2: Convert to fraction form
    12,938.24/17,855.16 = 7,903.28/x
  3. Step 3: Cross multiply
    12,938.24x = 17,855.16 × 7,903.28
  4. Step 4: Simplify right side
    12,938.24x = 141,114,328.92
  5. Step 5: Solve for x
    x = 141,114,328.92/12,938.24
  6. Step 6: Final answer
    x = 10,906.76

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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.