Home / 15,690.16-21,652.56-8,616.74

Finding the Fourth Proportional to 15,690.16, 21,652.56 and 8,616.74

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Solution

The fourth proportional to 15,690.16, 21,652.56 and 8,616.74 is: 11,891.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.16 : 21,652.56 = 8,616.74 : x
  2. Step 2: Convert to fraction form
    15,690.16/21,652.56 = 8,616.74/x
  3. Step 3: Cross multiply
    15,690.16x = 21,652.56 × 8,616.74
  4. Step 4: Simplify right side
    15,690.16x = 186,574,479.85
  5. Step 5: Solve for x
    x = 186,574,479.85/15,690.16
  6. Step 6: Final answer
    x = 11,891.18

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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.