Home / 15,298.08-21,107.76-8,920.86

Finding the Fourth Proportional to 15,298.08, 21,107.76 and 8,920.86

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Solution

The fourth proportional to 15,298.08, 21,107.76 and 8,920.86 is: 12,308.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,298.08 : 21,107.76 = 8,920.86 : x
  2. Step 2: Convert to fraction form
    15,298.08/21,107.76 = 8,920.86/x
  3. Step 3: Cross multiply
    15,298.08x = 21,107.76 × 8,920.86
  4. Step 4: Simplify right side
    15,298.08x = 188,299,371.87
  5. Step 5: Solve for x
    x = 188,299,371.87/15,298.08
  6. Step 6: Final answer
    x = 12,308.69

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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.