Home / 15,379.48-21,221.28-8,664.76

Finding the Fourth Proportional to 15,379.48, 21,221.28 and 8,664.76

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Solution

The fourth proportional to 15,379.48, 21,221.28 and 8,664.76 is: 11,956.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,379.48 : 21,221.28 = 8,664.76 : x
  2. Step 2: Convert to fraction form
    15,379.48/21,221.28 = 8,664.76/x
  3. Step 3: Cross multiply
    15,379.48x = 21,221.28 × 8,664.76
  4. Step 4: Simplify right side
    15,379.48x = 183,877,298.09
  5. Step 5: Solve for x
    x = 183,877,298.09/15,379.48
  6. Step 6: Final answer
    x = 11,956.02

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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.