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Finding the Fourth Proportional to 34,651.75, 47,820.28 and 21,230.40

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Solution

The fourth proportional to 34,651.75, 47,820.28 and 21,230.40 is: 29,298.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,651.75 : 47,820.28 = 21,230.40 : x
  2. Step 2: Convert to fraction form
    34,651.75/47,820.28 = 21,230.40/x
  3. Step 3: Cross multiply
    34,651.75x = 47,820.28 × 21,230.40
  4. Step 4: Simplify right side
    34,651.75x = 1,015,243,672.51
  5. Step 5: Solve for x
    x = 1,015,243,672.51/34,651.75
  6. Step 6: Final answer
    x = 29,298.49

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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.