Home / 15,508.70-21,405.10-9,219.86

Finding the Fourth Proportional to 15,508.70, 21,405.10 and 9,219.86

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Solution

The fourth proportional to 15,508.70, 21,405.10 and 9,219.86 is: 12,725.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.70 : 21,405.10 = 9,219.86 : x
  2. Step 2: Convert to fraction form
    15,508.70/21,405.10 = 9,219.86/x
  3. Step 3: Cross multiply
    15,508.70x = 21,405.10 × 9,219.86
  4. Step 4: Simplify right side
    15,508.70x = 197,352,025.29
  5. Step 5: Solve for x
    x = 197,352,025.29/15,508.70
  6. Step 6: Final answer
    x = 12,725.25

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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.