Home / 20,570.18-28,382.09-12,071.88

Finding the Fourth Proportional to 20,570.18, 28,382.09 and 12,071.88

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Solution

The fourth proportional to 20,570.18, 28,382.09 and 12,071.88 is: 16,656.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.18 : 28,382.09 = 12,071.88 : x
  2. Step 2: Convert to fraction form
    20,570.18/28,382.09 = 12,071.88/x
  3. Step 3: Cross multiply
    20,570.18x = 28,382.09 × 12,071.88
  4. Step 4: Simplify right side
    20,570.18x = 342,625,124.27
  5. Step 5: Solve for x
    x = 342,625,124.27/20,570.18
  6. Step 6: Final answer
    x = 16,656.40

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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.