Home / 15,428.32-21,291.20-8,354.88

Finding the Fourth Proportional to 15,428.32, 21,291.20 and 8,354.88

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Solution

The fourth proportional to 15,428.32, 21,291.20 and 8,354.88 is: 11,529.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.32 : 21,291.20 = 8,354.88 : x
  2. Step 2: Convert to fraction form
    15,428.32/21,291.20 = 8,354.88/x
  3. Step 3: Cross multiply
    15,428.32x = 21,291.20 × 8,354.88
  4. Step 4: Simplify right side
    15,428.32x = 177,885,421.06
  5. Step 5: Solve for x
    x = 177,885,421.06/15,428.32
  6. Step 6: Final answer
    x = 11,529.80

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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.