Home / 31,618.62-43,638.35-19,685.70

Finding the Fourth Proportional to 31,618.62, 43,638.35 and 19,685.70

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Solution

The fourth proportional to 31,618.62, 43,638.35 and 19,685.70 is: 27,169.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,618.62 : 43,638.35 = 19,685.70 : x
  2. Step 2: Convert to fraction form
    31,618.62/43,638.35 = 19,685.70/x
  3. Step 3: Cross multiply
    31,618.62x = 43,638.35 × 19,685.70
  4. Step 4: Simplify right side
    31,618.62x = 859,051,368.17
  5. Step 5: Solve for x
    x = 859,051,368.17/31,618.62
  6. Step 6: Final answer
    x = 27,169.16

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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.