Home / 30,440.12-42,034.12-19,129.28

Finding the Fourth Proportional to 30,440.12, 42,034.12 and 19,129.28

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Solution

The fourth proportional to 30,440.12, 42,034.12 and 19,129.28 is: 26,415.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,440.12 : 42,034.12 = 19,129.28 : x
  2. Step 2: Convert to fraction form
    30,440.12/42,034.12 = 19,129.28/x
  3. Step 3: Cross multiply
    30,440.12x = 42,034.12 × 19,129.28
  4. Step 4: Simplify right side
    30,440.12x = 804,082,193.04
  5. Step 5: Solve for x
    x = 804,082,193.04/30,440.12
  6. Step 6: Final answer
    x = 26,415.22

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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.