Home / 20,558.95-28,372.04-12,599.64

Finding the Fourth Proportional to 20,558.95, 28,372.04 and 12,599.64

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Solution

The fourth proportional to 20,558.95, 28,372.04 and 12,599.64 is: 17,387.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.95 : 28,372.04 = 12,599.64 : x
  2. Step 2: Convert to fraction form
    20,558.95/28,372.04 = 12,599.64/x
  3. Step 3: Cross multiply
    20,558.95x = 28,372.04 × 12,599.64
  4. Step 4: Simplify right side
    20,558.95x = 357,477,285.21
  5. Step 5: Solve for x
    x = 357,477,285.21/20,558.95
  6. Step 6: Final answer
    x = 17,387.92

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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.