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Finding the Fourth Proportional to 31,861.80, 43,970.76 and 17,719.20

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Solution

The fourth proportional to 31,861.80, 43,970.76 and 17,719.20 is: 24,453.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,861.80 : 43,970.76 = 17,719.20 : x
  2. Step 2: Convert to fraction form
    31,861.80/43,970.76 = 17,719.20/x
  3. Step 3: Cross multiply
    31,861.80x = 43,970.76 × 17,719.20
  4. Step 4: Simplify right side
    31,861.80x = 779,126,690.59
  5. Step 5: Solve for x
    x = 779,126,690.59/31,861.80
  6. Step 6: Final answer
    x = 24,453.32

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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.