Home / 31,138.77-42,970.05-19,203.24

Finding the Fourth Proportional to 31,138.77, 42,970.05 and 19,203.24

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Solution

The fourth proportional to 31,138.77, 42,970.05 and 19,203.24 is: 26,499.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,138.77 : 42,970.05 = 19,203.24 : x
  2. Step 2: Convert to fraction form
    31,138.77/42,970.05 = 19,203.24/x
  3. Step 3: Cross multiply
    31,138.77x = 42,970.05 × 19,203.24
  4. Step 4: Simplify right side
    31,138.77x = 825,164,182.96
  5. Step 5: Solve for x
    x = 825,164,182.96/31,138.77
  6. Step 6: Final answer
    x = 26,499.58

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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.