Home / 20,558.94-28,384.74-12,605.55

Finding the Fourth Proportional to 20,558.94, 28,384.74 and 12,605.55

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Solution

The fourth proportional to 20,558.94, 28,384.74 and 12,605.55 is: 17,403.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.94 : 28,384.74 = 12,605.55 : x
  2. Step 2: Convert to fraction form
    20,558.94/28,384.74 = 12,605.55/x
  3. Step 3: Cross multiply
    20,558.94x = 28,384.74 × 12,605.55
  4. Step 4: Simplify right side
    20,558.94x = 357,805,259.31
  5. Step 5: Solve for x
    x = 357,805,259.31/20,558.94
  6. Step 6: Final answer
    x = 17,403.88

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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.