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Finding the Fourth Proportional to 15,919.12, 21,970.02 and 8,847.82

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Solution

The fourth proportional to 15,919.12, 21,970.02 and 8,847.82 is: 12,210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,919.12 : 21,970.02 = 8,847.82 : x
  2. Step 2: Convert to fraction form
    15,919.12/21,970.02 = 8,847.82/x
  3. Step 3: Cross multiply
    15,919.12x = 21,970.02 × 8,847.82
  4. Step 4: Simplify right side
    15,919.12x = 194,386,782.36
  5. Step 5: Solve for x
    x = 194,386,782.36/15,919.12
  6. Step 6: Final answer
    x = 12,210.90

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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.