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Finding the Fourth Proportional to 19,615.28, 29,427.87 and 5,764.28

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Solution

The fourth proportional to 19,615.28, 29,427.87 and 5,764.28 is: 8,647.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,615.28 : 29,427.87 = 5,764.28 : x
  2. Step 2: Convert to fraction form
    19,615.28/29,427.87 = 5,764.28/x
  3. Step 3: Cross multiply
    19,615.28x = 29,427.87 × 5,764.28
  4. Step 4: Simplify right side
    19,615.28x = 169,630,482.48
  5. Step 5: Solve for x
    x = 169,630,482.48/19,615.28
  6. Step 6: Final answer
    x = 8,647.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.