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Finding the Fourth Proportional to 13,085.64, 18,064.08 and 8,611.74

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Solution

The fourth proportional to 13,085.64, 18,064.08 and 8,611.74 is: 11,888.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,085.64 : 18,064.08 = 8,611.74 : x
  2. Step 2: Convert to fraction form
    13,085.64/18,064.08 = 8,611.74/x
  3. Step 3: Cross multiply
    13,085.64x = 18,064.08 × 8,611.74
  4. Step 4: Simplify right side
    13,085.64x = 155,563,160.30
  5. Step 5: Solve for x
    x = 155,563,160.30/13,085.64
  6. Step 6: Final answer
    x = 11,888.08

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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.