Home / 23,128.92-31,918-12,518.56

Finding the Fourth Proportional to 23,128.92, 31,918 and 12,518.56

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Solution

The fourth proportional to 23,128.92, 31,918 and 12,518.56 is: 17,275.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,128.92 : 31,918 = 12,518.56 : x
  2. Step 2: Convert to fraction form
    23,128.92/31,918 = 12,518.56/x
  3. Step 3: Cross multiply
    23,128.92x = 31,918 × 12,518.56
  4. Step 4: Simplify right side
    23,128.92x = 399,567,398.08
  5. Step 5: Solve for x
    x = 399,567,398.08/23,128.92
  6. Step 6: Final answer
    x = 17,275.66

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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.