Home / 12,156.51-16,779.17-7,919.20

Finding the Fourth Proportional to 12,156.51, 16,779.17 and 7,919.20

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Solution

The fourth proportional to 12,156.51, 16,779.17 and 7,919.20 is: 10,930.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.51 : 16,779.17 = 7,919.20 : x
  2. Step 2: Convert to fraction form
    12,156.51/16,779.17 = 7,919.20/x
  3. Step 3: Cross multiply
    12,156.51x = 16,779.17 × 7,919.20
  4. Step 4: Simplify right side
    12,156.51x = 132,877,599.29
  5. Step 5: Solve for x
    x = 132,877,599.29/12,156.51
  6. Step 6: Final answer
    x = 10,930.57

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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.