Home / 30,436.21-42,008.99-19,807.39

Finding the Fourth Proportional to 30,436.21, 42,008.99 and 19,807.39

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Solution

The fourth proportional to 30,436.21, 42,008.99 and 19,807.39 is: 27,338.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,436.21 : 42,008.99 = 19,807.39 : x
  2. Step 2: Convert to fraction form
    30,436.21/42,008.99 = 19,807.39/x
  3. Step 3: Cross multiply
    30,436.21x = 42,008.99 × 19,807.39
  4. Step 4: Simplify right side
    30,436.21x = 832,088,448.44
  5. Step 5: Solve for x
    x = 832,088,448.44/30,436.21
  6. Step 6: Final answer
    x = 27,338.77

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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.