Home / 30,661.14-42,312.79-17,231.60

Finding the Fourth Proportional to 30,661.14, 42,312.79 and 17,231.60

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Solution

The fourth proportional to 30,661.14, 42,312.79 and 17,231.60 is: 23,779.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,661.14 : 42,312.79 = 17,231.60 : x
  2. Step 2: Convert to fraction form
    30,661.14/42,312.79 = 17,231.60/x
  3. Step 3: Cross multiply
    30,661.14x = 42,312.79 × 17,231.60
  4. Step 4: Simplify right side
    30,661.14x = 729,117,199.49
  5. Step 5: Solve for x
    x = 729,117,199.49/30,661.14
  6. Step 6: Final answer
    x = 23,779.84

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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.