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Finding the Fourth Proportional to 30,956.66, 42,719.91 and 16,808.66

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Solution

The fourth proportional to 30,956.66, 42,719.91 and 16,808.66 is: 23,195.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,956.66 : 42,719.91 = 16,808.66 : x
  2. Step 2: Convert to fraction form
    30,956.66/42,719.91 = 16,808.66/x
  3. Step 3: Cross multiply
    30,956.66x = 42,719.91 × 16,808.66
  4. Step 4: Simplify right side
    30,956.66x = 718,064,442.42
  5. Step 5: Solve for x
    x = 718,064,442.42/30,956.66
  6. Step 6: Final answer
    x = 23,195.80

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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.