Home / 21,325.20-29,423.70-12,824.40

Finding the Fourth Proportional to 21,325.20, 29,423.70 and 12,824.40

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Solution

The fourth proportional to 21,325.20, 29,423.70 and 12,824.40 is: 17,694.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,325.20 : 29,423.70 = 12,824.40 : x
  2. Step 2: Convert to fraction form
    21,325.20/29,423.70 = 12,824.40/x
  3. Step 3: Cross multiply
    21,325.20x = 29,423.70 × 12,824.40
  4. Step 4: Simplify right side
    21,325.20x = 377,341,298.28
  5. Step 5: Solve for x
    x = 377,341,298.28/21,325.20
  6. Step 6: Final answer
    x = 17,694.62

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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.