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Finding the Fourth Proportional to 14,987.58, 20,683.06 and 8,615.12

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Solution

The fourth proportional to 14,987.58, 20,683.06 and 8,615.12 is: 11,888.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.58 : 20,683.06 = 8,615.12 : x
  2. Step 2: Convert to fraction form
    14,987.58/20,683.06 = 8,615.12/x
  3. Step 3: Cross multiply
    14,987.58x = 20,683.06 × 8,615.12
  4. Step 4: Simplify right side
    14,987.58x = 178,187,043.87
  5. Step 5: Solve for x
    x = 178,187,043.87/14,987.58
  6. Step 6: Final answer
    x = 11,888.98

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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.