Home / 20,724.24-28,599.84-12,345.60

Finding the Fourth Proportional to 20,724.24, 28,599.84 and 12,345.60

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Solution

The fourth proportional to 20,724.24, 28,599.84 and 12,345.60 is: 17,037.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.24 : 28,599.84 = 12,345.60 : x
  2. Step 2: Convert to fraction form
    20,724.24/28,599.84 = 12,345.60/x
  3. Step 3: Cross multiply
    20,724.24x = 28,599.84 × 12,345.60
  4. Step 4: Simplify right side
    20,724.24x = 353,082,184.70
  5. Step 5: Solve for x
    x = 353,082,184.70/20,724.24
  6. Step 6: Final answer
    x = 17,037.16

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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.