Home / 20,557.27-28,369.16-12,057.65

Finding the Fourth Proportional to 20,557.27, 28,369.16 and 12,057.65

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Solution

The fourth proportional to 20,557.27, 28,369.16 and 12,057.65 is: 16,639.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.27 : 28,369.16 = 12,057.65 : x
  2. Step 2: Convert to fraction form
    20,557.27/28,369.16 = 12,057.65/x
  3. Step 3: Cross multiply
    20,557.27x = 28,369.16 × 12,057.65
  4. Step 4: Simplify right side
    20,557.27x = 342,065,402.07
  5. Step 5: Solve for x
    x = 342,065,402.07/20,557.27
  6. Step 6: Final answer
    x = 16,639.63

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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.