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Finding the Fourth Proportional to 21,605.01, 29,820.47 and 14,070.12

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Solution

The fourth proportional to 21,605.01, 29,820.47 and 14,070.12 is: 19,420.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,605.01 : 29,820.47 = 14,070.12 : x
  2. Step 2: Convert to fraction form
    21,605.01/29,820.47 = 14,070.12/x
  3. Step 3: Cross multiply
    21,605.01x = 29,820.47 × 14,070.12
  4. Step 4: Simplify right side
    21,605.01x = 419,577,591.36
  5. Step 5: Solve for x
    x = 419,577,591.36/21,605.01
  6. Step 6: Final answer
    x = 19,420.38

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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.