Home / 12,860.28-19,302.30-7,939.53

Finding the Fourth Proportional to 12,860.28, 19,302.30 and 7,939.53

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Solution

The fourth proportional to 12,860.28, 19,302.30 and 7,939.53 is: 11,916.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,860.28 : 19,302.30 = 7,939.53 : x
  2. Step 2: Convert to fraction form
    12,860.28/19,302.30 = 7,939.53/x
  3. Step 3: Cross multiply
    12,860.28x = 19,302.30 × 7,939.53
  4. Step 4: Simplify right side
    12,860.28x = 153,251,189.92
  5. Step 5: Solve for x
    x = 153,251,189.92/12,860.28
  6. Step 6: Final answer
    x = 11,916.63

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1.5x scale

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.