Home / 15,120.76-20,886.60-12,611.08

Finding the Fourth Proportional to 15,120.76, 20,886.60 and 12,611.08

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Solution

The fourth proportional to 15,120.76, 20,886.60 and 12,611.08 is: 17,419.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.76 : 20,886.60 = 12,611.08 : x
  2. Step 2: Convert to fraction form
    15,120.76/20,886.60 = 12,611.08/x
  3. Step 3: Cross multiply
    15,120.76x = 20,886.60 × 12,611.08
  4. Step 4: Simplify right side
    15,120.76x = 263,402,583.53
  5. Step 5: Solve for x
    x = 263,402,583.53/15,120.76
  6. Step 6: Final answer
    x = 17,419.93

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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.