Home / 15,690.08-21,652.72-8,616.88

Finding the Fourth Proportional to 15,690.08, 21,652.72 and 8,616.88

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Solution

The fourth proportional to 15,690.08, 21,652.72 and 8,616.88 is: 11,891.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.08 : 21,652.72 = 8,616.88 : x
  2. Step 2: Convert to fraction form
    15,690.08/21,652.72 = 8,616.88/x
  3. Step 3: Cross multiply
    15,690.08x = 21,652.72 × 8,616.88
  4. Step 4: Simplify right side
    15,690.08x = 186,578,889.91
  5. Step 5: Solve for x
    x = 186,578,889.91/15,690.08
  6. Step 6: Final answer
    x = 11,891.52

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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.