Home / 15,395.40-21,245.64-8,321.76

Finding the Fourth Proportional to 15,395.40, 21,245.64 and 8,321.76

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Solution

The fourth proportional to 15,395.40, 21,245.64 and 8,321.76 is: 11,484.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,395.40 : 21,245.64 = 8,321.76 : x
  2. Step 2: Convert to fraction form
    15,395.40/21,245.64 = 8,321.76/x
  3. Step 3: Cross multiply
    15,395.40x = 21,245.64 × 8,321.76
  4. Step 4: Simplify right side
    15,395.40x = 176,801,117.13
  5. Step 5: Solve for x
    x = 176,801,117.13/15,395.40
  6. Step 6: Final answer
    x = 11,484.02

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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.