Home / 15,005.92-20,709.14-8,291.55

Finding the Fourth Proportional to 15,005.92, 20,709.14 and 8,291.55

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Solution

The fourth proportional to 15,005.92, 20,709.14 and 8,291.55 is: 11,442.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,005.92 : 20,709.14 = 8,291.55 : x
  2. Step 2: Convert to fraction form
    15,005.92/20,709.14 = 8,291.55/x
  3. Step 3: Cross multiply
    15,005.92x = 20,709.14 × 8,291.55
  4. Step 4: Simplify right side
    15,005.92x = 171,710,869.77
  5. Step 5: Solve for x
    x = 171,710,869.77/15,005.92
  6. Step 6: Final answer
    x = 11,442.88

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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.