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Finding the Fourth Proportional to 15,888.47, 21,926.12 and 8,814.90

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Solution

The fourth proportional to 15,888.47, 21,926.12 and 8,814.90 is: 12,164.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,888.47 : 21,926.12 = 8,814.90 : x
  2. Step 2: Convert to fraction form
    15,888.47/21,926.12 = 8,814.90/x
  3. Step 3: Cross multiply
    15,888.47x = 21,926.12 × 8,814.90
  4. Step 4: Simplify right side
    15,888.47x = 193,276,511.11
  5. Step 5: Solve for x
    x = 193,276,511.11/15,888.47
  6. Step 6: Final answer
    x = 12,164.57

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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.