Home / 21,325.20-29,424.78-13,378.20

Finding the Fourth Proportional to 21,325.20, 29,424.78 and 13,378.20

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Solution

The fourth proportional to 21,325.20, 29,424.78 and 13,378.20 is: 18,459.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,325.20 : 29,424.78 = 13,378.20 : x
  2. Step 2: Convert to fraction form
    21,325.20/29,424.78 = 13,378.20/x
  3. Step 3: Cross multiply
    21,325.20x = 29,424.78 × 13,378.20
  4. Step 4: Simplify right side
    21,325.20x = 393,650,591.80
  5. Step 5: Solve for x
    x = 393,650,591.80/21,325.20
  6. Step 6: Final answer
    x = 18,459.41

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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.