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Finding the Fourth Proportional to 15,978.74, 22,051.63 and 8,808.65

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Solution

The fourth proportional to 15,978.74, 22,051.63 and 8,808.65 is: 12,156.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,978.74 : 22,051.63 = 8,808.65 : x
  2. Step 2: Convert to fraction form
    15,978.74/22,051.63 = 8,808.65/x
  3. Step 3: Cross multiply
    15,978.74x = 22,051.63 × 8,808.65
  4. Step 4: Simplify right side
    15,978.74x = 194,245,024.50
  5. Step 5: Solve for x
    x = 194,245,024.50/15,978.74
  6. Step 6: Final answer
    x = 12,156.47

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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.