Home / 15,882.78-21,904.65-12,856.35

Finding the Fourth Proportional to 15,882.78, 21,904.65 and 12,856.35

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Solution

The fourth proportional to 15,882.78, 21,904.65 and 12,856.35 is: 17,730.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,882.78 : 21,904.65 = 12,856.35 : x
  2. Step 2: Convert to fraction form
    15,882.78/21,904.65 = 12,856.35/x
  3. Step 3: Cross multiply
    15,882.78x = 21,904.65 × 12,856.35
  4. Step 4: Simplify right side
    15,882.78x = 281,613,847.03
  5. Step 5: Solve for x
    x = 281,613,847.03/15,882.78
  6. Step 6: Final answer
    x = 17,730.77

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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.