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Finding the Fourth Proportional to 21,888.96, 30,262.40 and 16,869.76

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Solution

The fourth proportional to 21,888.96, 30,262.40 and 16,869.76 is: 23,323.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,888.96 : 30,262.40 = 16,869.76 : x
  2. Step 2: Convert to fraction form
    21,888.96/30,262.40 = 16,869.76/x
  3. Step 3: Cross multiply
    21,888.96x = 30,262.40 × 16,869.76
  4. Step 4: Simplify right side
    21,888.96x = 510,519,425.02
  5. Step 5: Solve for x
    x = 510,519,425.02/21,888.96
  6. Step 6: Final answer
    x = 23,323.15

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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.