Home / 15,919.20-21,946.54-12,699.94

Finding the Fourth Proportional to 15,919.20, 21,946.54 and 12,699.94

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Solution

The fourth proportional to 15,919.20, 21,946.54 and 12,699.94 is: 17,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,919.20 : 21,946.54 = 12,699.94 : x
  2. Step 2: Convert to fraction form
    15,919.20/21,946.54 = 12,699.94/x
  3. Step 3: Cross multiply
    15,919.20x = 21,946.54 × 12,699.94
  4. Step 4: Simplify right side
    15,919.20x = 278,719,741.21
  5. Step 5: Solve for x
    x = 278,719,741.21/15,919.20
  6. Step 6: Final answer
    x = 17,508.40

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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.