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Finding the Fourth Proportional to 21,886.61, 32,860.74 and 11,220.72

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Solution

The fourth proportional to 21,886.61, 32,860.74 and 11,220.72 is: 16,846.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,886.61 : 32,860.74 = 11,220.72 : x
  2. Step 2: Convert to fraction form
    21,886.61/32,860.74 = 11,220.72/x
  3. Step 3: Cross multiply
    21,886.61x = 32,860.74 × 11,220.72
  4. Step 4: Simplify right side
    21,886.61x = 368,721,162.53
  5. Step 5: Solve for x
    x = 368,721,162.53/21,886.61
  6. Step 6: Final answer
    x = 16,846.89

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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.