Home / 31,547.87-43,535.99-18,120

Finding the Fourth Proportional to 31,547.87, 43,535.99 and 18,120

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Solution

The fourth proportional to 31,547.87, 43,535.99 and 18,120 is: 25,005.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,547.87 : 43,535.99 = 18,120 : x
  2. Step 2: Convert to fraction form
    31,547.87/43,535.99 = 18,120/x
  3. Step 3: Cross multiply
    31,547.87x = 43,535.99 × 18,120
  4. Step 4: Simplify right side
    31,547.87x = 788,872,138.80
  5. Step 5: Solve for x
    x = 788,872,138.80/31,547.87
  6. Step 6: Final answer
    x = 25,005.56

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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.