Home / 20,531.32-28,334.70-15,486.64

Finding the Fourth Proportional to 20,531.32, 28,334.70 and 15,486.64

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Solution

The fourth proportional to 20,531.32, 28,334.70 and 15,486.64 is: 21,372.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.32 : 28,334.70 = 15,486.64 : x
  2. Step 2: Convert to fraction form
    20,531.32/28,334.70 = 15,486.64/x
  3. Step 3: Cross multiply
    20,531.32x = 28,334.70 × 15,486.64
  4. Step 4: Simplify right side
    20,531.32x = 438,809,298.41
  5. Step 5: Solve for x
    x = 438,809,298.41/20,531.32
  6. Step 6: Final answer
    x = 21,372.68

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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.