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Finding the Fourth Proportional to 84,001.63, 126,000.96 and 20,821.63

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Solution

The fourth proportional to 84,001.63, 126,000.96 and 20,821.63 is: 31,232.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,001.63 : 126,000.96 = 20,821.63 : x
  2. Step 2: Convert to fraction form
    84,001.63/126,000.96 = 20,821.63/x
  3. Step 3: Cross multiply
    84,001.63x = 126,000.96 × 20,821.63
  4. Step 4: Simplify right side
    84,001.63x = 2,623,545,368.76
  5. Step 5: Solve for x
    x = 2,623,545,368.76/84,001.63
  6. Step 6: Final answer
    x = 31,232.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.