Home / 15,429.89-21,292.45-8,622.70

Finding the Fourth Proportional to 15,429.89, 21,292.45 and 8,622.70

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Solution

The fourth proportional to 15,429.89, 21,292.45 and 8,622.70 is: 11,898.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.89 : 21,292.45 = 8,622.70 : x
  2. Step 2: Convert to fraction form
    15,429.89/21,292.45 = 8,622.70/x
  3. Step 3: Cross multiply
    15,429.89x = 21,292.45 × 8,622.70
  4. Step 4: Simplify right side
    15,429.89x = 183,598,333.83
  5. Step 5: Solve for x
    x = 183,598,333.83/15,429.89
  6. Step 6: Final answer
    x = 11,898.87

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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.