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Finding the Fourth Proportional to 21,009.30, 29,451.90 and 21,009.30

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Solution

The fourth proportional to 21,009.30, 29,451.90 and 21,009.30 is: 29,451.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.30 : 29,451.90 = 21,009.30 : x
  2. Step 2: Convert to fraction form
    21,009.30/29,451.90 = 21,009.30/x
  3. Step 3: Cross multiply
    21,009.30x = 29,451.90 × 21,009.30
  4. Step 4: Simplify right side
    21,009.30x = 618,763,802.67
  5. Step 5: Solve for x
    x = 618,763,802.67/21,009.30
  6. Step 6: Final answer
    x = 29,451.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.