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Finding the Fourth Proportional to 21,607.55, 29,812.20 and 14,064.98

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Solution

The fourth proportional to 21,607.55, 29,812.20 and 14,064.98 is: 19,405.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,607.55 : 29,812.20 = 14,064.98 : x
  2. Step 2: Convert to fraction form
    21,607.55/29,812.20 = 14,064.98/x
  3. Step 3: Cross multiply
    21,607.55x = 29,812.20 × 14,064.98
  4. Step 4: Simplify right side
    21,607.55x = 419,307,996.76
  5. Step 5: Solve for x
    x = 419,307,996.76/21,607.55
  6. Step 6: Final answer
    x = 19,405.62

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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.