Home / 20,718.68-28,590.94-12,665.82

Finding the Fourth Proportional to 20,718.68, 28,590.94 and 12,665.82

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Solution

The fourth proportional to 20,718.68, 28,590.94 and 12,665.82 is: 17,478.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.68 : 28,590.94 = 12,665.82 : x
  2. Step 2: Convert to fraction form
    20,718.68/28,590.94 = 12,665.82/x
  3. Step 3: Cross multiply
    20,718.68x = 28,590.94 × 12,665.82
  4. Step 4: Simplify right side
    20,718.68x = 362,127,636.34
  5. Step 5: Solve for x
    x = 362,127,636.34/20,718.68
  6. Step 6: Final answer
    x = 17,478.32

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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.