Home / 15,378.70-21,222.60-8,305.12

Finding the Fourth Proportional to 15,378.70, 21,222.60 and 8,305.12

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Solution

The fourth proportional to 15,378.70, 21,222.60 and 8,305.12 is: 11,461.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.70 : 21,222.60 = 8,305.12 : x
  2. Step 2: Convert to fraction form
    15,378.70/21,222.60 = 8,305.12/x
  3. Step 3: Cross multiply
    15,378.70x = 21,222.60 × 8,305.12
  4. Step 4: Simplify right side
    15,378.70x = 176,256,239.71
  5. Step 5: Solve for x
    x = 176,256,239.71/15,378.70
  6. Step 6: Final answer
    x = 11,461.07

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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.