Home / 23,110.78-31,890.13-13,038.63

Finding the Fourth Proportional to 23,110.78, 31,890.13 and 13,038.63

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Solution

The fourth proportional to 23,110.78, 31,890.13 and 13,038.63 is: 17,991.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,110.78 : 31,890.13 = 13,038.63 : x
  2. Step 2: Convert to fraction form
    23,110.78/31,890.13 = 13,038.63/x
  3. Step 3: Cross multiply
    23,110.78x = 31,890.13 × 13,038.63
  4. Step 4: Simplify right side
    23,110.78x = 415,803,573.13
  5. Step 5: Solve for x
    x = 415,803,573.13/23,110.78
  6. Step 6: Final answer
    x = 17,991.76

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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.