Home / 30,971.65-42,735.82-18,235.57

Finding the Fourth Proportional to 30,971.65, 42,735.82 and 18,235.57

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Solution

The fourth proportional to 30,971.65, 42,735.82 and 18,235.57 is: 25,162.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,971.65 : 42,735.82 = 18,235.57 : x
  2. Step 2: Convert to fraction form
    30,971.65/42,735.82 = 18,235.57/x
  3. Step 3: Cross multiply
    30,971.65x = 42,735.82 × 18,235.57
  4. Step 4: Simplify right side
    30,971.65x = 779,312,037.12
  5. Step 5: Solve for x
    x = 779,312,037.12/30,971.65
  6. Step 6: Final answer
    x = 25,162.11

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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.