Home / 21,124.12-31,693.48-12,247.16

Finding the Fourth Proportional to 21,124.12, 31,693.48 and 12,247.16

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Solution

The fourth proportional to 21,124.12, 31,693.48 and 12,247.16 is: 18,374.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.12 : 31,693.48 = 12,247.16 : x
  2. Step 2: Convert to fraction form
    21,124.12/31,693.48 = 12,247.16/x
  3. Step 3: Cross multiply
    21,124.12x = 31,693.48 × 12,247.16
  4. Step 4: Simplify right side
    21,124.12x = 388,155,120.52
  5. Step 5: Solve for x
    x = 388,155,120.52/21,124.12
  6. Step 6: Final answer
    x = 18,374.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.