Home / 15,429.29-21,292.40-8,355.71

Finding the Fourth Proportional to 15,429.29, 21,292.40 and 8,355.71

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Solution

The fourth proportional to 15,429.29, 21,292.40 and 8,355.71 is: 11,530.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.29 : 21,292.40 = 8,355.71 : x
  2. Step 2: Convert to fraction form
    15,429.29/21,292.40 = 8,355.71/x
  3. Step 3: Cross multiply
    15,429.29x = 21,292.40 × 8,355.71
  4. Step 4: Simplify right side
    15,429.29x = 177,913,193.72
  5. Step 5: Solve for x
    x = 177,913,193.72/15,429.29
  6. Step 6: Final answer
    x = 11,530.88

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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.