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Finding the Fourth Proportional to 12,585.56, 18,852.41 and 7,378.88

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Solution

The fourth proportional to 12,585.56, 18,852.41 and 7,378.88 is: 11,053.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,585.56 : 18,852.41 = 7,378.88 : x
  2. Step 2: Convert to fraction form
    12,585.56/18,852.41 = 7,378.88/x
  3. Step 3: Cross multiply
    12,585.56x = 18,852.41 × 7,378.88
  4. Step 4: Simplify right side
    12,585.56x = 139,109,595.29
  5. Step 5: Solve for x
    x = 139,109,595.29/12,585.56
  6. Step 6: Final answer
    x = 11,053.12

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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.