Home / 20,689.32-28,564.74-13,627.74

Finding the Fourth Proportional to 20,689.32, 28,564.74 and 13,627.74

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Solution

The fourth proportional to 20,689.32, 28,564.74 and 13,627.74 is: 18,815.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.32 : 28,564.74 = 13,627.74 : x
  2. Step 2: Convert to fraction form
    20,689.32/28,564.74 = 13,627.74/x
  3. Step 3: Cross multiply
    20,689.32x = 28,564.74 × 13,627.74
  4. Step 4: Simplify right side
    20,689.32x = 389,272,849.89
  5. Step 5: Solve for x
    x = 389,272,849.89/20,689.32
  6. Step 6: Final answer
    x = 18,815.16

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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.