Home / 30,970.36-42,725.28-18,387.82

Finding the Fourth Proportional to 30,970.36, 42,725.28 and 18,387.82

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Solution

The fourth proportional to 30,970.36, 42,725.28 and 18,387.82 is: 25,366.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,970.36 : 42,725.28 = 18,387.82 : x
  2. Step 2: Convert to fraction form
    30,970.36/42,725.28 = 18,387.82/x
  3. Step 3: Cross multiply
    30,970.36x = 42,725.28 × 18,387.82
  4. Step 4: Simplify right side
    30,970.36x = 785,624,758.09
  5. Step 5: Solve for x
    x = 785,624,758.09/30,970.36
  6. Step 6: Final answer
    x = 25,366.99

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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.