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Finding the Fourth Proportional to 13,252.64, 19,888.68 and 7,420.64

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Solution

The fourth proportional to 13,252.64, 19,888.68 and 7,420.64 is: 11,136.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,252.64 : 19,888.68 = 7,420.64 : x
  2. Step 2: Convert to fraction form
    13,252.64/19,888.68 = 7,420.64/x
  3. Step 3: Cross multiply
    13,252.64x = 19,888.68 × 7,420.64
  4. Step 4: Simplify right side
    13,252.64x = 147,586,734.36
  5. Step 5: Solve for x
    x = 147,586,734.36/13,252.64
  6. Step 6: Final answer
    x = 11,136.40

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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.