Home / 31,145.55-42,980.93-16,999.30

Finding the Fourth Proportional to 31,145.55, 42,980.93 and 16,999.30

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Solution

The fourth proportional to 31,145.55, 42,980.93 and 16,999.30 is: 23,459.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,145.55 : 42,980.93 = 16,999.30 : x
  2. Step 2: Convert to fraction form
    31,145.55/42,980.93 = 16,999.30/x
  3. Step 3: Cross multiply
    31,145.55x = 42,980.93 × 16,999.30
  4. Step 4: Simplify right side
    31,145.55x = 730,645,723.35
  5. Step 5: Solve for x
    x = 730,645,723.35/31,145.55
  6. Step 6: Final answer
    x = 23,459.07

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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.