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Finding the Fourth Proportional to 15,118.76, 20,883.84 and 12,609.08

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Solution

The fourth proportional to 15,118.76, 20,883.84 and 12,609.08 is: 17,417.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.76 : 20,883.84 = 12,609.08 : x
  2. Step 2: Convert to fraction form
    15,118.76/20,883.84 = 12,609.08/x
  3. Step 3: Cross multiply
    15,118.76x = 20,883.84 × 12,609.08
  4. Step 4: Simplify right side
    15,118.76x = 263,326,009.27
  5. Step 5: Solve for x
    x = 263,326,009.27/15,118.76
  6. Step 6: Final answer
    x = 17,417.17

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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.