Home / 15,227.70-21,013.36-8,421.32

Finding the Fourth Proportional to 15,227.70, 21,013.36 and 8,421.32

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Solution

The fourth proportional to 15,227.70, 21,013.36 and 8,421.32 is: 11,620.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,227.70 : 21,013.36 = 8,421.32 : x
  2. Step 2: Convert to fraction form
    15,227.70/21,013.36 = 8,421.32/x
  3. Step 3: Cross multiply
    15,227.70x = 21,013.36 × 8,421.32
  4. Step 4: Simplify right side
    15,227.70x = 176,960,142.12
  5. Step 5: Solve for x
    x = 176,960,142.12/15,227.70
  6. Step 6: Final answer
    x = 11,620.94

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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.