Home / 10,690.28-16,108.40-8,785.16

Finding the Fourth Proportional to 10,690.28, 16,108.40 and 8,785.16

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Solution

The fourth proportional to 10,690.28, 16,108.40 and 8,785.16 is: 13,237.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,690.28 : 16,108.40 = 8,785.16 : x
  2. Step 2: Convert to fraction form
    10,690.28/16,108.40 = 8,785.16/x
  3. Step 3: Cross multiply
    10,690.28x = 16,108.40 × 8,785.16
  4. Step 4: Simplify right side
    10,690.28x = 141,514,871.34
  5. Step 5: Solve for x
    x = 141,514,871.34/10,690.28
  6. Step 6: Final answer
    x = 13,237.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.