Home / 28,186.95-38,897.91-15,611.70

Finding the Fourth Proportional to 28,186.95, 38,897.91 and 15,611.70

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Solution

The fourth proportional to 28,186.95, 38,897.91 and 15,611.70 is: 21,544.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,186.95 : 38,897.91 = 15,611.70 : x
  2. Step 2: Convert to fraction form
    28,186.95/38,897.91 = 15,611.70/x
  3. Step 3: Cross multiply
    28,186.95x = 38,897.91 × 15,611.70
  4. Step 4: Simplify right side
    28,186.95x = 607,262,501.55
  5. Step 5: Solve for x
    x = 607,262,501.55/28,186.95
  6. Step 6: Final answer
    x = 21,544.10

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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.