Home / 15,428.28-21,291.06-8,354.66

Finding the Fourth Proportional to 15,428.28, 21,291.06 and 8,354.66

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Solution

The fourth proportional to 15,428.28, 21,291.06 and 8,354.66 is: 11,529.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.28 : 21,291.06 = 8,354.66 : x
  2. Step 2: Convert to fraction form
    15,428.28/21,291.06 = 8,354.66/x
  3. Step 3: Cross multiply
    15,428.28x = 21,291.06 × 8,354.66
  4. Step 4: Simplify right side
    15,428.28x = 177,879,567.34
  5. Step 5: Solve for x
    x = 177,879,567.34/15,428.28
  6. Step 6: Final answer
    x = 11,529.45

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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.