Home / 20,718.86-28,592.04-11,287.42

Finding the Fourth Proportional to 20,718.86, 28,592.04 and 11,287.42

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Solution

The fourth proportional to 20,718.86, 28,592.04 and 11,287.42 is: 15,576.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.86 : 28,592.04 = 11,287.42 : x
  2. Step 2: Convert to fraction form
    20,718.86/28,592.04 = 11,287.42/x
  3. Step 3: Cross multiply
    20,718.86x = 28,592.04 × 11,287.42
  4. Step 4: Simplify right side
    20,718.86x = 322,730,271.49
  5. Step 5: Solve for x
    x = 322,730,271.49/20,718.86
  6. Step 6: Final answer
    x = 15,576.65

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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.