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Finding the Fourth Proportional to 38,395.40, 52,989.95 and 21,401.20

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Solution

The fourth proportional to 38,395.40, 52,989.95 and 21,401.20 is: 29,536.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,395.40 : 52,989.95 = 21,401.20 : x
  2. Step 2: Convert to fraction form
    38,395.40/52,989.95 = 21,401.20/x
  3. Step 3: Cross multiply
    38,395.40x = 52,989.95 × 21,401.20
  4. Step 4: Simplify right side
    38,395.40x = 1,134,048,145.98
  5. Step 5: Solve for x
    x = 1,134,048,145.98/38,395.40
  6. Step 6: Final answer
    x = 29,536.04

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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.