Home / 15,310.80-21,131.21-9,345.93

Finding the Fourth Proportional to 15,310.80, 21,131.21 and 9,345.93

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Solution

The fourth proportional to 15,310.80, 21,131.21 and 9,345.93 is: 12,898.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,310.80 : 21,131.21 = 9,345.93 : x
  2. Step 2: Convert to fraction form
    15,310.80/21,131.21 = 9,345.93/x
  3. Step 3: Cross multiply
    15,310.80x = 21,131.21 × 9,345.93
  4. Step 4: Simplify right side
    15,310.80x = 197,490,753.60
  5. Step 5: Solve for x
    x = 197,490,753.60/15,310.80
  6. Step 6: Final answer
    x = 12,898.79

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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.