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Finding the Fourth Proportional to 15,213, 20,994.40 and 8,498.92

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Solution

The fourth proportional to 15,213, 20,994.40 and 8,498.92 is: 11,728.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,213 : 20,994.40 = 8,498.92 : x
  2. Step 2: Convert to fraction form
    15,213/20,994.40 = 8,498.92/x
  3. Step 3: Cross multiply
    15,213x = 20,994.40 × 8,498.92
  4. Step 4: Simplify right side
    15,213x = 178,429,726.05
  5. Step 5: Solve for x
    x = 178,429,726.05/15,213
  6. Step 6: Final answer
    x = 11,728.77

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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.