Home / 15,298.15-21,107.85-8,920.92

Finding the Fourth Proportional to 15,298.15, 21,107.85 and 8,920.92

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Solution

The fourth proportional to 15,298.15, 21,107.85 and 8,920.92 is: 12,308.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,298.15 : 21,107.85 = 8,920.92 : x
  2. Step 2: Convert to fraction form
    15,298.15/21,107.85 = 8,920.92/x
  3. Step 3: Cross multiply
    15,298.15x = 21,107.85 × 8,920.92
  4. Step 4: Simplify right side
    15,298.15x = 188,301,441.22
  5. Step 5: Solve for x
    x = 188,301,441.22/15,298.15
  6. Step 6: Final answer
    x = 12,308.77

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Half scale
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Double scale
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Similar ratio
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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.