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Finding the Fourth Proportional to 12,645.32, 18,967.97 and 7,484.00

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Solution

The fourth proportional to 12,645.32, 18,967.97 and 7,484.00 is: 11,225.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.32 : 18,967.97 = 7,484.00 : x
  2. Step 2: Convert to fraction form
    12,645.32/18,967.97 = 7,484.00/x
  3. Step 3: Cross multiply
    12,645.32x = 18,967.97 × 7,484.00
  4. Step 4: Simplify right side
    12,645.32x = 141,956,211.35
  5. Step 5: Solve for x
    x = 141,956,211.35/12,645.32
  6. Step 6: Final answer
    x = 11,225.99

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.