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Finding the Fourth Proportional to 31,361.40, 43,299 and 19,437.39

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Solution

The fourth proportional to 31,361.40, 43,299 and 19,437.39 is: 26,836.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,361.40 : 43,299 = 19,437.39 : x
  2. Step 2: Convert to fraction form
    31,361.40/43,299 = 19,437.39/x
  3. Step 3: Cross multiply
    31,361.40x = 43,299 × 19,437.39
  4. Step 4: Simplify right side
    31,361.40x = 841,619,549.61
  5. Step 5: Solve for x
    x = 841,619,549.61/31,361.40
  6. Step 6: Final answer
    x = 26,836.16

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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.