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Finding the Fourth Proportional to 15,888.72, 21,925.48 and 8,814.72

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Solution

The fourth proportional to 15,888.72, 21,925.48 and 8,814.72 is: 12,163.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,888.72 : 21,925.48 = 8,814.72 : x
  2. Step 2: Convert to fraction form
    15,888.72/21,925.48 = 8,814.72/x
  3. Step 3: Cross multiply
    15,888.72x = 21,925.48 × 8,814.72
  4. Step 4: Simplify right side
    15,888.72x = 193,266,967.07
  5. Step 5: Solve for x
    x = 193,266,967.07/15,888.72
  6. Step 6: Final answer
    x = 12,163.78

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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.