Home / 31,138.98-42,977.67-19,502.59

Finding the Fourth Proportional to 31,138.98, 42,977.67 and 19,502.59

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Solution

The fourth proportional to 31,138.98, 42,977.67 and 19,502.59 is: 26,917.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,138.98 : 42,977.67 = 19,502.59 : x
  2. Step 2: Convert to fraction form
    31,138.98/42,977.67 = 19,502.59/x
  3. Step 3: Cross multiply
    31,138.98x = 42,977.67 × 19,502.59
  4. Step 4: Simplify right side
    31,138.98x = 838,175,886.87
  5. Step 5: Solve for x
    x = 838,175,886.87/31,138.98
  6. Step 6: Final answer
    x = 26,917.25

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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.