Home / 15,429.32-21,292.03-9,141.70

Finding the Fourth Proportional to 15,429.32, 21,292.03 and 9,141.70

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Solution

The fourth proportional to 15,429.32, 21,292.03 and 9,141.70 is: 12,615.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.32 : 21,292.03 = 9,141.70 : x
  2. Step 2: Convert to fraction form
    15,429.32/21,292.03 = 9,141.70/x
  3. Step 3: Cross multiply
    15,429.32x = 21,292.03 × 9,141.70
  4. Step 4: Simplify right side
    15,429.32x = 194,645,348.77
  5. Step 5: Solve for x
    x = 194,645,348.77/15,429.32
  6. Step 6: Final answer
    x = 12,615.29

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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.